Index / The Ordinary / Amino Acids + B5
The Ordinary

Amino Acids + B5.

The Ordinary Amino Acids + B5

About this product

A lightweight hydrating serum containing essential amino acids and panthenol (B5), designed to deliver moisture and support skin barrier health.

Full ingredients

Guru Score

88%

Yay

3 experts · Moderate agreement
3Gurus
3Yay
0Mixed
0Nay

What they liked

  • Lightweight, water-like texture absorbs quickly
  • Hydrating without stickiness or residue
  • Works with any active ingredient

What they flagged

    Nothing. None of the experts who reviewed it raised a problem.

    What the gurus are saying

    This serum earns consistent praise for its water-like texture that absorbs instantly without any stickiness or residue, making it comfortable enough for even oily and acne-prone skin. The amino acid blend works as a pure hydrating base that layers seamlessly with active ingredients like retinol, tretinoin, and glycolic acid without conflict, and reviewers particularly recommend applying it before starting active treatments to help buffer dryness and irritation. At under £10, gurus find it delivers results comparable to far pricier amino acid products and suggest it as everyday hydration year-round or especially during drier months.
    Synthesized from 3 expert reviews · most recent take August 2026

    What the gurus are saying.

    Every take we've logged from this product's reviews across YouTube. Click any row to watch the moment they said it.

    All takes Yay takes Nay takes Mixed takes Hide sponsored
    Yay
    "The Ordinary Amino Acids Plus B5 is truly like water. I've talked about this product for as long as I've had my YouTube channel, over seven years now, and it's one I continue to use over and over, more so during the colder months, but I do like to use it in the summer too when my skin feels tight or I want additional hydration. It's always my go to for that hydrating serum, very thin and lightweight, like water. It's a really underrated product that provides a lot of deep hydration and makes my skin feel good when it's compromised or tight. It's an awesome serum to use every day, great before or after actives, exfoliating acids, or tretinoin, because it doesn't conflict with anything. It's very gentle, has no fragrance, isn't sticky or tacky, dries down skin-like, and it's exceptional."
    Top Pick: hydrating serum
    All 34 takes from Sincerely Miss Ash
    6 ULTIMATE TRETINOIN PAIRINGS TO MAXIMIZE RESULTS FOR SIGNS OF AGING AND SKIN REPAIR
    "If your main concern is just hydration and that's it, this is the serum that I would 100% recommend. It is so affordable yet so effective. I've been talking about this serum for over seven years and I cannot get enough of it myself. I use this on an everyday basis. I love it. Morning and evening I'm using it. This is a really nice serum that is ultra lightweight. It's not sticky or tacky. It's not heavy. Perfect for all skin types. Even if you have the oiliest of skin types, this is still perfect to use on a daily. This is especially great paired with tretinoin because tretinoin can cause irritation and dryness. And this helps to prevent and eliminate some of that dryness. It's not going to eliminate dryness completely, especially if your skin is prone to dryness, and I still get flaky around my mouth and eyebrows, but this really helps to keep the skin hydrated in those deeper layers of the skin. And it just keeps your skin looking radiant and healthy."
    5 MOST UNDERRATED ORDINARY SERUMS EVERYONE FORGOT ABOUT (HIDDEN GEMS YOU NEED!)
    "The one that you always hear me talking about is The Ordinary Amino Acids + B5. I have been talking about this since the first year of my YouTube channel and I've had my channel for over seven years and this is still a product that I talk about to this day. I feel like I'm the only one that talks about this and I don't understand why. This is so underrated. It really is an amazing hydrating serum that works for all skin types. You can have the oiliest skin ever and you can also have the most parched, dry, flaky skin. This is truly going to work for both. This is great for everyone and the best thing about this is that it's so lightweight. It's never sticky or tacky on the skin. When you put this on your skin, it feels like you didn't even really put anything on your skin. That is how lightweight it is, but it provides so much hydration. It just gives more of that skin repair and I use it every day, twice a day. Lately, the last year or so, I've eliminated this out of my skincare routines during the summer months because the last few summers have been very hot and I just don't need the additional hydration, but fall all the way to spring, I am using this constantly and I do occasionally still use it in the summer as well. It is very lightweight and it pairs up with everything. Pair this up with your active ingredients to keep your skin hydrated, to help prevent further irritation and dryness. Use this with tretinoin, copper peptides, vitamin C. Pair it up with anything. You are going to absolutely love this. I guarantee it."
    THE ORDINARY & NIOD APRIL SALE 2026 | TOP 18 ANTI-AGING PRODUCTS + THE PRODUCTS THAT ALWAYS SELL OUT
    "This is one of the best hydrating serums I have ever used"
    HONEST BEAUTY EMPTIES | SKINCARE & HAIRCARE PRODUCTS I'VE USED UP + WILL I REPURCHASE?
    "It's very friendly and it does add a lot of hydration where it just makes your skin look and feel so good. [...] This is very underrated and honestly I feel like I'm the only one that talks about this. It's so affordable, it's like under $10 and it works really well. I generally go through one bottle every month when I am consistent and using it every day, twice a day, though I am very generous with it. But if you were only using a few drops, you could probably get two to two and a half months out of it."
    RAPID RESULTS! THE ORDINARY ANTI-AGING SKINCARE ROUTINE USING THE NEW RETINAL 0.2% EMULSION
    "This is a product that I can't live without. I use this literally every day twice a day, and whether my skin needs hydration or not I still use this. This is especially great if you're using actives like a retinal or a glycolic or lactic acid because this just creates that nice hydration barrier before applying that active ingredient. And this can also help to repair the barrier as well. This is extremely lightweight, it's not heavy in the least. It's like water, your skin absorbs it really quickly. You don't have this sticky tacky feel to your skin either. Your skin doesn't look greasy and there is absolutely no pilling with this as well. So you can truly pair this up with any skincare ingredient without conflicts. And this can be used every day twice a day."
    SMOOTHER LIPS WITHOUT FILLER - THE ORDINARY SQUALANE + AMINO ACIDS LIP BALM - NO LIP BALM ADDICTION
    "Squalane and amino acids are the two key ingredients in the formulation. Squalane is very hydrating, this helps to soften the skin, but also it provides barrier support which is what we need when it comes to the lips, and amino acids provides long-lasting hydration. I use the amino acids serum pretty much every day and it's a great hydrating serum, so I put it all over my face as well as my neck. When my lips are a little dry and they feel tight and uncomfortable I will actually put the amino acids serum on my lips because I'm so impressed with how much hydration it provides my skin. It's nice to see that this has the amino acids and it does work and perform the same as the serum, and then of course the squalane for that barrier support but also to soften the skin and to provide extra hydration. This is actually a multi-use balm so you can use this on your lips but you can also use this on other areas as well. The Ordinary recommends for you to use this on your cuticles, which I have done a couple of times and it actually made them quite soft, but I feel like you would get better results if you were to apply this every day or a few times per day. Once every couple of days I don't feel like it's going to do much."
    BEAUTY PRODUCT'S I'VE USED UP || BEAUTY EMPTIES 2024 - SINCERELY MISS ASH
    "I haven't been really using this serum lately because I don't feel I need that additional hydration right now since we are in the summer months, but I still use it, don't get me wrong. This is still one of my favorite serums from The Ordinary. Right now with how hot and humid it is, I just don't really need this extra step, but of course I have backups and I will be using this again probably next month."
    3 AMAZING TRETINOIN PAIRINGS FOR MAXIMUM RESULTS | ANTI-AGING, UNEVEN SKIN AND MORE!
    "I always incorporate a hydrating serum when I'm using tretinoin, and it's The Ordinary Amino Acids + B5. This really helps to keep the skin hydrated and comfortable but also repaired. Tretinoin can cause dryness, and I am a big fan of hydrating serums. I use this every day, twice a day, even in my morning routine. This is the first product that I would apply."
    FALL SKINCARE MUST HAVES YOU NEED FOR A SEAMLESS TRANSITION FROM SUMMER TO FALL - Sincerely Miss Ash
    "This is a product that I've been talking about for a really long time on my channel. I've been talking about this religiously over the last few years. It truly is an underrated serum from The Ordinary that I feel like everybody needs to have in their collection, whether you need additional hydration or not. Amino acids are the building blocks of proteins like collagen and elastin, so this is essential for healthy skin - great for signs of aging and keeping your skin healthy. This is also great for skin repair if your skin is feeling a little compromised or angry. It's a great product to incorporate. But if you also want additional hydration, then I'm telling you, you have to pick this up and start using it every day. You can use this in the summer - I generally do - but this past summer it's been so hot and muggy that I didn't have to use it. I was trying to keep my routines to a minimum because I didn't want my skin to feel suffocated and I wanted my skin to still breathe. I have combination skin and my skin can be quite oily as well, so now that fall is here I will start using this again and I will use it every day, twice a day until probably next summer. This is absolutely fabulous. I hope they come out with a bigger size because this is 30ml."
    MY NIGHTTIME ANTI-AGING SKINCARE ROUTINE | P.M. WINTER SKINCARE ROUTINE | OVER 30 SINCERELY MISS ASH
    "I'm obsessed with this as well. This is a great hydrating serum, but it also helps repair the skin barrier. I put one full syringe of this into the palm of my hand. You don't have to put this much - you can just put four or five drops. But I do like to be generous with it because I love the way my skin looks and feels every time I use it, especially when my skin is feeling tight and dry. It really takes my skin to the next level. Whether my skin needs that additional hydration or not, I still use it because I just like my skin to be as moist as possible. It just looks more youthful, your face and skin don't look creepy, and it has this plump to it. I do put this underneath my eyes because I think it's quite gentle. But always be cautious with what you put around the eyes because we're all different and that skin is so thin and delicate."
    BEAUTY EMPTIES 2024 | SKINCARE, MAKEUP & SUPPLEMENTS | PRODUCTS I'VE USED UP!
    "I also have an empty Amino Acids + B5. I have two here. This is a hydrating serum that I use every day, twice a day, and I can't be without this. This is truly wonderful. If you have dry skin and you're looking for something additional for hydration, try this. But honestly, you can have oily skin, combination skin, and this is still going to perform really well. And even when my skin is at its oiliest, I still use this because I always want my skin to be as hydrated as possible. I have backups of this also."
    BEAUTY EMPTIES 2023! SKINCARE, HAIRCARE & MAKEUP | PRODUCT'S I'VE USED UP SINCERELY MISS ASH
    "I have one empty Ordinary Amino Acids + B5 and you guys know this is my favorite hydrating serum to use on an everyday basis. I do go through one bottle every month."
    NEXT LEVEL ANTI-AGING SERUM! THE NEW ORDINARY GF 15% SOLUTION | YOU NEED TO TRY THIS NOW!
    "This serum reminds me a lot of the ordinary amino acids plus B5 in terms of the texture this is very thin like water just like the amino acids"
    DECIEM SALE 2024 | MUST HAVE PRODUCTS YOU NEED FROM THE ORDINARY, NIOD & LOOPHA - SINCERELY MISS ASH
    "If you're looking for a really nice hydrating serum, something that's affordable, not plumping but maybe a little repairing, then you need to check out The Ordinary Amino Acids + B5. I'm obsessed with this. I've been using this pretty much every single day for the last several years. It's my go-to serum from The Ordinary. It's a hidden gem and it's very underrated. This is phenomenal to add additional hydration. Whether your skin needs hydration or not, it's still great to use. It's a great product to use with active ingredients like a chemical exfoliant, those ingredients that tend to dry out our skin. You can use this with anything. It's very friendly and I love it so much. I usually use a whole syringe full all over my face and my neck. Of course you can portion out the drops if you want to, but I'm a little overboard so I do like to apply more because I just love the way it makes my skin look and feel. It's fabulous. I will be purchasing multiple bottles of this. I do this every year and it's a must for sure."
    THIS DRY SKIN SKINCARE ROUTINE WILL GIVE YOU THE MOST HYDRATED, MOISTURIZED SKIN EVER!
    "This is a great hydrating serum but it also helps to repair the skin at the same time, and I use this when I'm using my actives but I also use this in skincare routines as well. This serum is like water, so it's very thin and lightweight, and it absorbs quite quickly. This serum really does the job well to keep the skin comfortable. This serum is very underrated, and I talk about this all the time. If The Ordinary ever discontinues this product, I don't even know what I'd do. I would honestly have a meltdown because this serum has truly saved my skin when it's in the worst state, and it keeps my skin comfortable and balanced when it's in a good state. It really is a wonderful serum."
    THE BEST SERUMS FOR DRY SKIN | WINTER 2023
    "The Ordinary Amino Acids + B5 is one of the best hydrating serums I have ever incorporated in both my morning and nighttime routine. This is a product that I talk a lot about here on my channel. When I love and believe in something and when there's a product that actually works, I always want to share it and reintroduce it all the time. This is a product that I use every day, twice a day, whether my skin needs hydration or not, and I've been using this for multiple years and it never ever disappoints. I just love the way that my skin looks and feels every time I use this. This is more of a hydrating serum. It does slightly repair your skin barrier, but it's more for hydration. Pair this up with your actives. You never have to worry about this conflicting because this will work with any ingredient that you pair up with it. I've never had an issue with peeling either. I go through one bottle every single month and I'm almost done with this one right now. This one has that watery texture, so it spreads really nicely and your skin absorbs it."
    THE ORDINARY & NIOD SALE 2025 | TOP 17 ANTI-AGING PRODUCTS + THE PRODUCTS THAT ALWAYS SELL OUT!
    "This is a product that I am very obsessed with. The one that I stock up a lot with. It is really affordable. [...] I use it every day, twice a day, especially come fall, winter, and early spring. I use a full syringe full every single time. And it just provides my skin with so much hydration. And it also has some skin repair abilities as well, but it's more for hydration. So if you're lacking hydration, you just need a little bit more of that glow up, this is absolutely wonderful to use. You can use this with a lot of active ingredients. There's no conflicts. You can pair this up with anything and everything. It is a very friendly ingredient. [...] It is literally like water. Like it truly is like water. So it spreads really nicely across the skin. You can use it on your neck as well as your chest and décolletage. And this is a very underrated serum."
    NEW! THE ORDINARY SOOTHING & BARRIER SUPPORT SERUM REVIEW | REPAIR YOUR SKIN BARRIER FAST!
    "You know how much I love the Ordinary Amino Acids + B5, especially if you've been with me for a while. That's a great hydrating serum. When I was testing this I was pairing it up with the Amino Acids + B5 and that pairing was exceptional for hydration. So if you have dryness or you're looking for something to be very hydrating on your skin for the fall winter months, try pairing this up with the Amino Acids and that pairing was amazing."
    TOP BEAUTY PRODUCTS I'VE REPURCHASED OVER AND OVER AGAIN | SKINCARE & HAIRCARE WORTH EVERY PENNY
    "This is the Amino Acids + B5. To be honest, this is my most repurchased product from The Ordinary. You guys know how much I love this. If I'm super consistent with this, this only lasts me one month, this is a 30ml size, but I use it every day, twice a day, and I use a full syringe full. I am very generous when I use this because I just love the amount of hydration that I get from it. It is super gentle and really affordable. Now during the summer I don't really reach for this as much as fall, winter, and spring because I don't always need that additional hydration. But this is honestly great for all skin types. Even if you're oily and have acne-prone skin, this doesn't cause breakouts. I have combination skin and I am very acne-prone. It is super thin, lightweight, doesn't leave a sticky, tacky film on the skin, and it dries down skin-like. I can't recommend this enough. It really is great for those that have dry skin, sensitive skin. It's thin like water. It's one of the most lightweight serums I have ever used, especially when it comes to a hydrating serum."
    RESULTS GUARANTEED! 10 PRO TRETINOIN/RETINAL PAIRINGS TO LIMIT SKIN IRRITATION AND SIGNS OF AGING
    "Another great serum that you can use is The Ordinary Amino Acids + B5. This is their hydrating serum that really does provide a lot of moisture to the skin. It's just adding some additional hydration, and I really love this and it does the job really well. I use this every day twice a day and I pair it up with anything and everything. It keeps my skin nice and hydrated. This is something you'd want to put on before your actives. You could put it on after a toner or a facial mist but before thicker products. The texture is like water - it's very thin and lightweight and it spreads really nicely. You can bring this down your neck and your chest as well. I love it, I really do. This is very underrated from The Ordinary, and I highly recommend it, especially when you're using your actives."
    BEAUTY PRODUCT'S I'VE USED UP || SKINCARE, MAKEUP AND HAIRCARE - BEAUTY EMPTIES 2024
    "The Ordinary Amino Acids + B5 is a hydrating serum. This is like water, it spreads across the skin really nicely. It's a nice way to add additional hydration into your routine, especially if your skin is drier or it's feeling tight. But it's also a nice serum to use on an everyday basis whether you need hydration or not, because it just keeps your skin barrier in check. It does give a nice glow to the skin. And if you're using active ingredients like retinol or tretinoin that can irritate and dry out your skin, this is great to use with them to prevent dryness. So this is a must in my collection."
    PRODUCT'S I'VE USED UP | WOULD I REPURCHASE? BEAUTY EMPTIES 2023
    "I have two The Ordinary Amino Acids + B5, which is a great hydrating serum. I use this pretty much every single day and I can't live without it. It really works wonders, especially if you have dry skin or you just want to keep your skin as hydrated as possible. This is great with active ingredients or just on its own. This really is great. So if you're looking for a good hydrating serum, I would say pick up that one. And yes, I do have backups of that. I always do because I go through a bottle every single month."
    DECIEM SALE 2023 | MUST HAVE PRODUCTS YOU NEED! THE ORDINARY & NIOD SALE
    "I am most definitely purchasing multiple bottles of The Ordinary Amino Acids + B5. If you've been with me for a while you know how obsessed I am with this serum. I use this every day twice a day, and when I use it I use one full syringe full every single time, so one bottle will last me pretty much a month. I like to stock up on this because it's something that I feel everybody should have in their skincare routine as it's a great hydrating serum, whether you need it or not. I just love the way that my skin looks and feels when I use this and it's great for all. If you haven't tried this, I really do recommend it."
    MY MORNING ANTI-AGING SKINCARE ROUTINE | A.M. WINTER SKINCARE ROUTINE | OVER 30 SINCERELY MISS ASH
    "This is The Ordinary Amino Acids + B5, and it's a great hydrating serum. It's a must, every day, twice a day, no matter what season we're in. I use this literally 365 days of the year. It's my go-to, perfect for all skin types, including dry skin. I put one full syringe into my hand. Of course, you don't need to put that much, but I do. I like to be very generous with this. The texture is like water. I really love the way this transforms my skin. It's super hydrating and also very repairing to the skin. But even if my skin isn't dry and doesn't need TLC, this is still part of my routine because it gives my skin this glow. I love the way my skin looks. I really hope that The Ordinary never gets rid of this serum because it's underrated and it's literally one of the best serums in their collection."
    BEAUTY EMPTIES 2023 | PRODUCT'S I'VE USED UP.. WILL I REPURCHASE?
    "This is a great hydrating serum. I use it every day twice a day. It's literally my favorite."
    THE BEST ORDINARY PRODUCTS FOR DRY/DEHYDRATED SKIN | GET PLUMP, HYDRATED & MOISTURIZED SKIN FAST!
    "I want to talk about the Amino Acids + B5 first, and if you've been with me for a while, you know how obsessed I am with this. I always need backups. I usually have about four or five bottles in my linen closet ready to go because this is a serum that I cannot live without. I use this every day, twice a day, and it never disappoints. This gives my skin so much hydration and really helps to repair the skin barrier. It's very lightweight and not greasy whatsoever. The formula is like water, so your skin absorbs it so nicely. It's very thin, and you can pair this up with anything without issues with peeling. I pair this up with Tretinoin at night, I use this with copper peptides, vitamin C, niacinamide, and I use this with anything and everything because this is a very universal serum that just works all the time. Whether you have dry skin or not, this is still great to use on an everyday basis because it allows your skin to remain youthful. You get this nice glow to your skin because it's so hydrated. This is a very underrated serum, and I'm the only one that ever talks about this, and I don't hear anybody else raving about this serum. If The Ordinary ever discontinued this serum, I don't know what I would do. I would have a meltdown because this really is one of the best serums from The Ordinary. Anybody that I have recommended this to has always loved and enjoyed this serum."
    BEAUTY EMPTIES 2025 || SKINCARE, MAKEUP AND HAIRCARE PRODUCT'S I'VE USED UP - PROJECT PAN
    "The Amino Acids + B5 is a hydrating serum that really does give that comfort to the skin. It hydrates, it's just lovely to use on an everyday basis, especially during the winter months, but I will use this all year round. If you're someone that is new to retinol or some type of active ingredient and you're experiencing dryness and irritation, start incorporating this serum prior to, and this will help to give more moisture to the skin and it can also help to slightly repair the barrier as well. This is fabulous, this is underrated, and I always need to have backups of this."
    TOP 7 BEST PERFORMING ORDINARY SKINCARE PRODUCTS - THE ULTIMATE GUIDE FOR ANTI-AGING "REAL RESULTS"
    "This is the amino acids plus B5. A very underrated serum. I feel like I'm the only one that talks about this. [...] It is ultra lightweight. And when I say this is lightweight, it dries down skin-like, and it feels like you haven't even put anything on your skin. It's not tacky. It's not sticky. You don't feel any type of residue. It is extremely lightweight. Your skin absorbs it really quickly, and it's like water. It's like putting water on your skin. [...] It's very thin like water. And it's one of the first serums that I use in my skincare routine after a facial mist or after an essence. And I usually use this before thicker based serums and creams. If I'm using a vitamin C serum, sometimes I will use my vitamin C first and then this afterwards. [...] But there's no conflicts with this. You don't have to worry about this not pairing up with something else. It's just hydration and it does an amazing job. It's great for all skin types, including dry, including oily, acne prone skin."
    2 MONTH UPDATE! I TESTED THE ORDINARY GF 15% SOLUTION AND I AM SHOCKED WITH THE RESULTS!
    "This serum reminds me a lot of the ordinary amino acids plus B5 if you're familiar with that serum it's a hydrating serum this is very similar in the type of texture that it contains and I really like it"
    MY NIGHTTIME ANTI-AGING SKINCARE ROUTINE | P.M. SUMMER SKINCARE ROUTINE | OVER 30
    "The Ordinary Amino Acids + B5 is a great hydrating serum but it also helps to repair the skin barrier at the same time. I like using this all the time, every day twice a day, but I especially like to use this when I'm using active ingredients like tretinoin or lactic acid because it keeps the skin hydrated and repaired. I am very, very generous with this product. I put an entire syringe full of this. Of course, you don't need to do this, but I love this and I just love the way that it makes my skin feel. It's a great hydrating serum that is super lightweight and sits great under all skin care products. This is a very underrated product. I've mentioned that so many times on my channel and this is just fabulous. If you're looking for a lightweight serum that hydrates, get this because it is amazing."
    THESE ARE THE TOP 5 MOST UNDERRATED ORDINARY PRODUCTS THAT NO ONE TALKS ABOUT - SINCERELY MISS ASH
    "I truly feel like I am the only creator that obsessively talks about this. This has been my go-to for years and I've been using this every day twice a day for as long as I can remember, and this never disappoints. This past summer I actually didn't use it because it was really hot and muggy here in Ontario and I didn't need this serum, I didn't need that additional hydration. But now that it's fall, I'm going to be using this every day twice a day until next summer because this provides my skin with that right amount of moisture. It keeps my skin in check. It helps to repair your skin barrier. Amino acids are the building blocks of proteins, which help support skin health and skin elasticity. This really is a product that I feel everybody can benefit from, whether you're using it twice a day or just in your morning routine or nighttime. It's a friendly ingredient that can be paired up with anything. Pair this up with glycolic acid, pair it up with products that tend to irritate your skin, this is going to help save your skin when you're using actives. And during the winter months, it's very thin like water. It absorbs into your skin so nicely. Your skin truly just drinks it."
    THE ORDINARY & NIOD SALE 2023 | I SPLURGED ONCE AGAIN AND THIS IS WHAT I PURCHASED!
    "I did pick up five The Ordinary Amino Acids + B5. This is a great hydrating serum that also helps to repair the skin. I am obsessed with this product, and every time there's a sale I always stock up. This is something that I use literally every day, twice a day, and I will go through one bottle every month or one bottle every five weeks, so I go through these pretty quickly. I will most likely place one more transaction with another five because you can only purchase five of the same product in one transaction. I haven't placed another order yet, but I most likely will, so I got my five at least."
    21 BEAUTY PRODUCTS I'VE USED UP | BEAUTY EMPTIES 2026 - SKINCARE, MAKEUP & HAIRCARE - PROJECT PAN
    "This is a hydrating serum I use quite a bit, I was using it a lot during the winter months and I still occasionally use it when my skin feels a little tight and [...] drier. It's a great everyday hydrating serum no matter your skin type, fabulous for dry skin, but if you have combination or oily skin you're going to love it too. It's perfect on my combo acne prone skin, it never causes issues, and it just keeps my skin looking and feeling its best. [...] I have several backups of this."
    7 BEST LIGHTWEIGHT SKINCARE FOR SUMMER ☀️ | Non-Greasy Products That Layer Perfectly Under Makeup
    "The Ordinary Amino Acids Plus B5 is truly like water. I've talked about this product for as long as I've had my YouTube channel, over seven years now, and it's one I continue to use over and over, more so during the colder months, but I do like to use it in the summer too when my skin feels tight or I want additional hydration. It's always my go to for that hydrating serum, very thin and lightweight, like water. It's a really underrated product that provides a lot of deep hydration and makes my skin feel good when it's compromised or tight. It's an awesome serum to use every day, great before or after actives, exfoliating acids, or tretinoin, because it doesn't conflict with anything. It's very gentle, has no fragrance, isn't sticky or tacky, dries down skin-like, and it's exceptional."
    Yay
    "I love this. I've actually run out. I've been clinging on just waiting for this sale before I put it on order. And this is my winter skin care savior. If you're somebody that has very dryness prone skin, particularly in the cooler winter months, get this because it's the surefire way to supercharge your moisturizer. Get you whatever moisturizer works for you. But if you feel that it needs a little bit of extra hydration in the winter months, just add a couple of drops of The Ordinary Amino Acids to it. I'll put some moisturizer in the palm of my hand. Two drops of The Ordinary Amino Acids. Mix it together and apply it to the skin. This will really take your moisturizer to the next level. And it's just a really inexpensive way of getting some extra hydration in your life. You can use it on the face, you can use it on the body. Some people choose to use it neat, you know, direct from the dropper straight to the face, which you can do. I mix it in with my moisturizer because I feel that that gives the very best application. But this again was an absolute no-brainer when it came to purchasing it. I've only put two on order because I tend only to use it in the cooler winter months, which is when my skin needs it. But if you're someone that's dryness prone year round, this might be something you stock up on."
    All 6 takes from Mad About Skin
    NEXT LEVEL ANTI AGING - 4 Secret Anti-Ageing Ingredients
    "My favorite has been The Ordinary Amino Acids + B5. It kind of does what it says on the tin - amino acid loaded, it's there front and center in the title. I think you've got to go a long way to find a better amino acid serum than the one from The Ordinary. Super inexpensive, it has a range of different amino acids in there to boost hydration, to feed the skin those ingredients that it needs, and it can also have some anti-inflammatory benefits too."
    No1 SKINCARE INGREDIENT 2024 - Key To Effective Anti Aging
    "This is the Amino Acids + B5. It contains all of those essential amino acids and it costs £8. Don't get sucked into the hype that's going around with amino acids and feel like you have to pay like $150 to get the very best serum you don't. Just throw this into your skincare routine. I was shocked when I fully understood the range of different amino acids in here, it does it all, it's got it all. [...] It's impossibly lightweight as a serum; it practically feels like water on the skin, which is great if you're looking for a lightweight amino acid treatment. [...] For that price point I'd say call off the search, don't look any further. [...] A lot of the higher price options don't offer half of what you're getting in this. [...] They highlight this as being primarily a hydrating serum, which it is, but the range of different essential amino acids in here means it's going to do more than that. It's going to promote skin health, help with wound healing, promote collagen and elastin production. I think it could be an amazing additional product to add to your skin routine to elevate your results. I love this."
    NEXT LEVEL PEPTIDE SERUMS - Maximise Collagen In Skin
    "The Ordinary Amino Acids, this does what it says on the tin really. Great amino acid based serum, super lightweight, extra hydration, calming and soothing. It's a great option to pair with any peptide serum, not just the one from the ordinary."
    TOP 20 BEST SKINCARE PRODUCTS 2023 - Part 1 of 2
    "If you haven't tried The Ordinary Amino Acids and B5, and you're thinking okay maybe I could do with a little extra hydration in my routine, a little calming, a little soothing, and just an overall boost to the skin barrier and health, get this little gem of serum. For an affordable price point, I think The Ordinary Amino Acids really do deserve a little extra hype, a little extra love, and just a little bit more attention. For me this definitely deserves a place on the best skincare list of this year, and hopefully with amino acids growing in popularity, this is a product that people will start to truly appreciate for what it's worth in the next 12 months."
    #1 SERUM 2025 - Top 10 Serums Revealed
    "The Ordinary Amino Acids is great for hydration. If you have very dryness prone skin, particularly in the cooler winter months, this is where my skin starts to go through it. Just slip this in. I mix a couple of drops in with my moisturizer, and it just gives you that extra plumping, that extra hydration. It's really easy. You don't need to do it as a separate step. Just put a few drops into the palm of your hand, add your moisturizer in, mix it in, and it kind of supercharges your moisturizer. So that's a cheeky little hack that I would give to everyone. Supercharge your moisturizer by buying the Ordinary Amino Acids and that way you don't need to spend money on like La Mer or the bougie rich moisturizers out there. Just up your moisturizer game for those cooler winter months by adding a couple of drops of this. It's that good and I recommend it to everybody."
    THE ORDINARY SALE 2025 - Top 10 The Ordinary Serums
    "I love this. I've actually run out. I've been clinging on just waiting for this sale before I put it on order. And this is my winter skin care savior. If you're somebody that has very dryness prone skin, particularly in the cooler winter months, get this because it's the surefire way to supercharge your moisturizer. Get you whatever moisturizer works for you. But if you feel that it needs a little bit of extra hydration in the winter months, just add a couple of drops of The Ordinary Amino Acids to it. I'll put some moisturizer in the palm of my hand. Two drops of The Ordinary Amino Acids. Mix it together and apply it to the skin. This will really take your moisturizer to the next level. And it's just a really inexpensive way of getting some extra hydration in your life. You can use it on the face, you can use it on the body. Some people choose to use it neat, you know, direct from the dropper straight to the face, which you can do. I mix it in with my moisturizer because I feel that that gives the very best application. But this again was an absolute no-brainer when it came to purchasing it. I've only put two on order because I tend only to use it in the cooler winter months, which is when my skin needs it. But if you're someone that's dryness prone year round, this might be something you stock up on."
    Yay
    "Their amino acid B5 is one I've repurchased a few times, which is just a bunch of amino acids which are really great for anti-aging. I kind of moved on from this one but I still come back to it from time to time. It's a really nice one, and when I first tried it I was goo goo gaga over it."

    What the evidence says.

    Independent of what the gurus think, this is what the published research supports about the main active ingredients here.

    Humectants and emollients

    Ingredients like these draw water into the surface layers and slow how fast it leaves. The evidence is for comfort, softness and hydration rather than for changing the structure of the skin.

    Source: DermNet

    Frequently asked.

    What is The Ordinary Amino Acids + B5?

    A lightweight hydrating serum containing essential amino acids and panthenol (B5), designed to deliver moisture and support skin barrier health.

    Is The Ordinary Amino Acids + B5 worth it?

    Yes. All 3 gurus who reviewed it give it their stamp of approval, for a Guru Score of 88%.

    What is The Ordinary Amino Acids + B5's Guru Score?

    The Ordinary Amino Acids + B5 holds a Guru Score of 88%. That is our read on how warmly the experts talk about it, based on the verdicts of 3 expert reviewers we have collected. At least one expert has named it a Top Pick in its category.

    Who is The Ordinary Amino Acids + B5 best for?

    The Ordinary Amino Acids + B5 is generally suited to dry skin and sensitive skin.

    Similar products worth a look.

    Other products the same gurus have weighed in on, plus more from this brand and category.

    Compare side by side →

    Share this score

    Add this badge to your blog or website. It links back to this page and updates itself when the experts change their minds. Free, no sign-up.

    Then paste it into your site's HTML or embed block.

    This week's top beauty news, in your inbox.

    A weekly read of the takes worth catching up on: the raves, the splits, the ones the gurus won't shut up about. Free, no spam, unsubscribe whenever.

    Subscribe to the digest