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Hydrium Watery Toner.

COSRX Hydrium Watery Toner
Toners

About this product

A lightweight hydrating toner formulated with peptides, niacinamide, and poly glutamic acid to hydrate and soothe the skin while maintaining a non-greasy finish.

Full ingredients

Guru Score

77%

Yay

11 experts · Strong agreement
11Gurus
10Yay
0Mixed
1Nay
#16 in TonersSee the ranking →

What they liked

  • Absorbs quickly without tackiness
  • Layers well with acne treatments and retinoids

What they flagged

  • Mild plastic-like smell

What the gurus are saying

This watery toner earns praise for its peptide blend and poly glutamic acid, which gurus say hydrate without heaviness and work well for oily or combination skin. The texture is the standout: consistently described as incredibly lightweight and fast-absorbing, it layers seamlessly under treatments and leaves skin with a natural, non-greasy finish. One expert flagged misleading labeling on the Centella asiatica claim, noting the concentration is minimal, though they confirmed the product itself is soothing and safe for a compromised skin barrier; a few others caution that morning use with sunscreen may feel heavy on very oily skin, so evening application may suit those with oiliness best.
Synthesized from 11 expert reviews · most recent take November 2025

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.

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Yay
"You can never go wrong with this stuff. It has no scent to it. It's lovely."
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"In my opinion I would say this one's great for oily acne prone and sensitive skin"
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"I most often use it in my evening routine but certain days in the morning when my skin's feeling dry. [...] It feels nice to use but for oilier skin I have a feeling that using this in your morning routine especially if you're going to use it with sunscreen and anything else it could be a bit over the top and a bit too much. Just pat it to soak it in but it does take a little bit of time to soak in. If you have oily skin using it at night is great then you just let it soak in while you're sleeping. [...] Once it soaks in it goes to kind of a radiant finish which is nice and glowy. The beneficial ingredients in this one include rice bran water which is emollient, rice extract which is soothing and emollient, niacinamide which is anti-acne and skin brightening, hydroxyurea which is a urea derivative with humectant benefits, panthenol which is a great soothing and hydrating ingredient, sodium hyaluronic which is another good humectant, and Cornus officinalis leaf extract which is [...] anti-inflammatory and really good for hydrating skin and I can't say I've ever seen it before in another product."
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"The same brand that makes the snail mus and cream it's amazing uh they have some really nice moisturizers and toners and Essences"
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"It can help with texture, pore minimization, and appearance, hydrates and balances oily skin, and it's typically recommended most often for oily or combination skin, or dull skin, or skin that's just lacking in luster."
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"You can never go wrong with this stuff. It has no scent to it. It's lovely."
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"It's gentle yet hydrating yet effective and efficient"
Nay
"It says it's got 100% Centella asiatica. This is just not true. [...] The first ingredient in here is water. You're looking at 99% water in this product. Then it's got butylene glycol, then it's got 1,2-hexanediol, and then the fourth ingredient in here is Centella. So you're looking at a fraction of a percent of Centella, maybe 1% in this entire thing. And then calling it 100% Centella asiatica, I don't like it because you're being [...] misled. I really don't like that for my skin of color family. [...] But having said this, it's a naysafe product and it's actually a lovely product if you're looking for something that is just hydrating and soothing to the skin. If you have a damaged skin barrier, I'm happy for you to use this. Are you going to get any brightening effects with it? No. Is it going to help with texture? No. Is it going to help with fine lines? No. But [...] it is naysafe and it's going to be good if you have a dehydrated barrier."
Yay
"I cannot tell you how much I love and adore this the only Town side is this is this is an overnight mask you pop it on during the day and take it off but this is an overnight mask Sona is a bit of a learning curve but I'm absolutely Blown Away by the results"
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"I cannot tell you how much I love and adore this the only Town side is this is this is an overnight mask you pop it on during the day and take it off but this is an overnight mask Sona is a bit of a learning curve but I'm absolutely Blown Away by the results"
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"It is truly multi use... this is a fabulous product what I absolute love is its spray"
Yay
"I'm going to use the tear tier milky toner despite what it looks like. I've been using this for some time and it just never seems to go down. It's a very nice, more on the moisturizing side of milky toners but still nice and light. It smells a little bit like plastic."
Yay
"This stands apart as one of the best options when it comes to those of us that need a little anti-aging boost and need a little extra hydration. [...] You've got that coverage in this style of product. It finishes not dewy, not glossy or greasy, it's just a guaranteed good skin day, and I love that. [...] If you like guaranteed good skin with some extra hydration and a dose of peptides, this is the one."
Yay
"Layers so well with acne treatment products that are really drying if you're using like a retinoid gel or a benzoyl peroxide wash this is so good"
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"This is an essence toner that I cannot believe I forgot about because this is actually what started it all. [...] This is [...] liquid grape jelly. [...] She recommended this and I have purchased probably 10 plus bottles at this point. [...] If you want the OG, if you want the good stuff, if you just want the basic most calming for sensitive skin, this is your answer."
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"Layers so well with acne treatment products that are really drying if you're using like a retinoid gel or a benzoyl peroxide wash this is so good"
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"COSRX has an oil-free moisturizing lotion that looks good."
Yay
"I do find that they make great essences and toners and it's their peptide booster for those individuals who can't get over that sticky tackiness. This is one that is a must try. It is super watery, super lightweight. You pump onto your palms like two pumps, you pat it all over your skin after cleansing, absorbs really quickly and because it's so lightweight it's very versatile in the sense I find that many people can benefit from this product. I also love the ingredients, especially for those who are tackling anti-aging concerns. It has a blend of various different peptides including copper tripeptide. Copper has been huge and I think it's going to continue to grow in popularity because number one it's antioxidant, it's anti-inflammatory, has wound healing properties and also has been shown as one of the few peptides that can truly help to support collagen synthesis. With how watery and lightweight this product is, it's really helpful for tackling fine lines and wrinkles. It also has niacinamide in there and also various different blends of amino acids. So just all around a wonderful lightweight product, really easy to incorporate into your morning and evening routine."
Yay
"This has a very creamy texture but it's very lightweight it feels like there's nothing on it leaves a natural finish on the skin"
Yay
"The can make mermaid skin gel or skin uvf one it's another amazing Korean option it just sits nicely Blends invisibly feels like your Skin's naked but it's not"
Yay
"I like this cleanser, I've always liked it. It's a centella and green tea cleanser that is really nice because centella, although I did say I don't love actives in cleansers, has calming ingredients as does green tea. I would suggest if you are going to use this, let it sit on your face for a few minutes and then wash it off, otherwise you're wasting your parents' hard-earned cash or your own hard-earned cash."
Yay
"If you're someone who really likes snail mucin, [...] this is one that I think you will really like. If you hated snail mucin, like it didn't work for you, then I would stay away from this because it has a very similar consistency, a similar texture. [...] But here's where this product has really been one that I think flies under the radar. It's that it's got poly glutamic acid in it, which I don't know why brands are not so generous with this ingredient because it compliments hyaluronic acid really well or performs really well on its own because it is hydrating but it creates this slippery soothing film on the surface of the skin to also reduce water loss. So it has occlusive properties but it's not heavy. Wonderful option to consider if you have very oily or what you consider combination skin where you have patches of oiliness and dryness. It addresses the needs of the skin barrier without feeling super greasy or heavy. [...] You can use it at night time after cleansing, apply it as a first step after cleansing at night or if you're using another product that is more of a liquid, thinner texture, you would put that on first and then this on over. It works really well as a standalone moisturizer at that point, especially if you're going to put a topical retinoid on over it."
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"I think these kits are a great way to try these products out those of you who love the snail Essence and an all-in-one gel cream as much as I do great time to stock up"
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"If you're someone who really likes snail mucin, [...] this is one that I think you will really like. If you hated snail mucin, like it didn't work for you, then I would stay away from this because it has a very similar consistency, a similar texture. [...] But here's where this product has really been one that I think flies under the radar. It's that it's got poly glutamic acid in it, which I don't know why brands are not so generous with this ingredient because it compliments hyaluronic acid really well or performs really well on its own because it is hydrating but it creates this slippery soothing film on the surface of the skin to also reduce water loss. So it has occlusive properties but it's not heavy. Wonderful option to consider if you have very oily or what you consider combination skin where you have patches of oiliness and dryness. It addresses the needs of the skin barrier without feeling super greasy or heavy. [...] You can use it at night time after cleansing, apply it as a first step after cleansing at night or if you're using another product that is more of a liquid, thinner texture, you would put that on first and then this on over. It works really well as a standalone moisturizer at that point, especially if you're going to put a topical retinoid on 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 COSRX Hydrium Watery Toner?

A lightweight hydrating toner formulated with peptides, niacinamide, and poly glutamic acid to hydrate and soothe the skin while maintaining a non-greasy finish.

Is COSRX Hydrium Watery Toner worth it?

Mostly yes. 10 of the 11 gurus who reviewed it give it their stamp of approval, for a Guru Score of 77%.

What is COSRX Hydrium Watery Toner's Guru Score?

COSRX Hydrium Watery Toner holds a Guru Score of 77%. That is our read on how warmly the experts talk about it, based on the verdicts of 11 expert reviewers we have collected.

Who is COSRX Hydrium Watery Toner best for?

COSRX Hydrium Watery Toner is generally suited to dry skin and sensitive skin.

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