The Ordinary Marine Hyaluronics: a Guru Score of 87%

What the experts use it for.

The concerns the experts tie this product to, in their own words. Paid and founder takes don't count.

Skin barrier support2 experts

“This is a wonderful serum for hydration and to help repair a damaged skin barrier.”

Cassandra Bankson, watch at 9:38

Dehydrated skin2 experts

“Your skin never really feels dry or parched.”

James Welsh, watch at 6:24

Rough or uneven texture1 expert

“It keeps the top layers of the skin hydrated and ultimately that smooths out fine lines and skin texture.”

Dr Dray, watch at 2:36

Fine lines and wrinkles1 expert

“It keeps the top layers of the skin hydrated and ultimately that smooths out fine lines and skin texture.”

Dr Dray, watch at 2:36

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

No BS Beauty

89k subs

✓Yay

"It's got red marine algae, which is a great hydrating ingredient, and then it's got several amino acids, which are great for barrier repairing. I really love this stuff. It's so easy to fit into any routine because it's just so light. You can certainly layer it. [...] I patted this on and then I patted on a little bit of another product right after, and it layered really nice and gave my skin some extra moisture."

All 5 takes from No BS Beauty

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"I think this is my third time purchasing this and I just ordered it a few days ago. It's The Ordinary Marine Hyaluronics Moisture Lock Serum. [...] I'm not a big fan necessarily of hyaluronic acid and those ingredients in general since they're just in so many things, so I really like something lighter and this one is just wonderful. It's literally like a watery texture but a little bit goes a long way and it really does plump up your skin when you use it."

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"It's super light so you can add it to your routine almost like an essence or a toner and it just gives you so much moisture. I would say this one is really great for dehydrated skin types. It's super liquidy, almost more liquidy than water, so it's hard to use it without feeling like you're wasting it. But [...] I love it. [...] It's really easy to fit in your routine and it has some really nice ingredients in it, simple and affordable."

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"The Marine Hyaluronics are super lightweight, watery, liquid, hydrating ingredients. You want to layer this under other moisturizers or serums, but it's really nice, lightweight, super affordable. Probably one of the more lightweight products that exist, and it just feels really nice and hydrating on your skin."

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"It's got red marine algae, which is a great hydrating ingredient, and then it's got several amino acids, which are great for barrier repairing. I really love this stuff. It's so easy to fit into any routine because it's just so light. You can certainly layer it. [...] I patted this on and then I patted on a little bit of another product right after, and it layered really nice and gave my skin some extra moisture."

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"This is my third bottle of the Marine Hyaluronics, it's seven bucks, it's a super lightweight serum. There's a lot of hydrating serums, this one is super super super lightweight, lighter texture than water. I think this one's probably best during the summer or to layer it with other products, but it is very very liquidy. You can [...] apply this after toning and then go with your serum or moisturizer."

Sincerely Miss Ash

196k subs

✓Yay

"It's very thin and watery. It doesn't leave your skin tacky or sticky. It still hydrates and plumps your skin, but we have red algae in here and it just contains different ingredients. So if you don't like that heavy sticky tacky feel of hyaluronic acid, then you may want to look into the Marine Hyaluronics. [...] If you still want something that is even lighter and even thinner on the skin, try the Marine Hyaluronics."

Top Pick: serum for dryness and tightness

All 5 takes from Sincerely Miss Ash

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"Somebody asked me how this compares to The Ordinary Marine Hyaluronics. Very similar, especially in texture, but I like this better. I like this way better than Marine Hyaluronics."

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"The Ordinary Marine Hyaluronics is very similar to hyaluronic acid in the way that it plumps and hydrates the skin, but this is very very lightweight, like water. It spreads nicely and absorbs into the skin really well. I've never experienced peeling with this, but sometimes with The Ordinary hyaluronic acid serum sometimes I do experience pilling. I like this one more for the summer because of how lightweight it is."

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"It's very thin and watery. It doesn't leave your skin tacky or sticky. It still hydrates and plumps your skin, but we have red algae in here and it just contains different ingredients. So if you don't like that heavy sticky tacky feel of hyaluronic acid, then you may want to look into the Marine Hyaluronics. [...] If you still want something that is even lighter and even thinner on the skin, try the Marine Hyaluronics."

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"If you like hyaluronic acids but you don't like how they feel sticky and tacky on the skin, maybe you're experiencing pilling with hyaluronic acids, [...] then I would say go with the Marine Hyaluronics. This is going to be plumping and hydrating. It's [...] great for your morning and for your evening. I go through a bottle every single month, so I always have backups of that."

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"This is very very unique. I haven't found a serum that is similar to this yet. This one acts as your hyaluronic acid alternative so if you don't like hyaluronic acid then I would say go with Marine Hyaluronics because this serum is still going to plump and hydrate your skin no different than hyaluronic acid but this formula is thinner, it's not greasy, it's not heavy and it's like water so your skin absorbs this really nicely. There is no peeling and you can also use this everyday twice a day."

Dr Dray

2.69M subs

✓Yay

"The Ordinary makes a wonderful hydrating serum, the Marine Hyaluronics. I highly recommend it. It keeps the top layers of the skin hydrated and ultimately that smooths out fine lines and skin texture. It also helps support skin barrier turnover because the hydration that is held there in place allows the enzymes and the skin barrier to function better and ultimately that supports cell turnover. You also have glycerin which can penetrate a little bit more deeply to hydrate the skin."

Cassandra Bankson

2.46M subs

✓Yay

"This is from The Ordinary and this is an absolute must. [...] The Marine Hyaluronics are fantastic. This is a wonderful serum for hydration and to help repair a damaged skin barrier. [...] This also has an algae extract which is extraordinarily supportive to skin and again very hydrating. [...] This is a water-soluble form of hyaluronic acid and a water-soluble algae extract in this little bottle."

All 2 takes from Cassandra Bankson

If Ariel The Little Mermaid's Had A Skincare Routine For Glowing & Hydrated Skin, This Is It

"This is from The Ordinary and this is an absolute must. [...] The Marine Hyaluronics are fantastic. This is a wonderful serum for hydration and to help repair a damaged skin barrier. [...] This also has an algae extract which is extraordinarily supportive to skin and again very hydrating. [...] This is a water-soluble form of hyaluronic acid and a water-soluble algae extract in this little bottle."

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"The Ordinary Marine Hyaluronics is an oldie but a goodie and much less expensive. It used to be $8 when I bought it in the summer. [...] This is really nice and lightweight and I find that this is much more watery and a little bit less grippy. When I used this along with Debbie's shower method, it was fantastic, and the hyaluronic acid in this product bound to my skin and soaked in so beautifully."

James Welsh

1.58M subs

✓Yay

"It's a water-based formula targeting hydration below the skin's surface for a softer, plumper complexion. [...] You don't get the satisfaction of using a thick serum - it's very lightweight and watery - but it does really make you feel very deeply hydrated. With consistent use over [...] a month, you do see plumpness and a revived quality to your skin. [...] Your skin never really feels dry or parched."

Mad About Skin

734k subs

✓Yay

"You will get a better level of hydration from the Marine Hyaluronics than you will from the hyaluronic acid. It's also less likely to cause dryness because it works in a subtly different way. Hyaluronic acid is a humectant which draws in moisture. And if you're living in quite a dry and arid environment, it can actually end up sucking moisture from the deeper levels of the skin, actually being counterintuitive and dehydrating. You don't get that risk with the Marine Hyaluronics."

What the evidence says.

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

Salicylic acid

Salicylic acid dissolves in oil, so it can get into a pore rather than just working on the surface. That is why it has long-standing evidence for blackheads and milder acne.

Source: DermNet

Frequently asked.

What is The Ordinary Marine Hyaluronics?

A lightweight, water-based hydrating serum from The Ordinary, designed to plump and hydrate skin with algae extract and water-soluble hyaluronic acid.

Is The Ordinary Marine Hyaluronics worth it?

Yes. All 6 gurus who reviewed it give it their stamp of approval, for a Guru Score of 87%.

What is The Ordinary Marine Hyaluronics's Guru Score?

The Ordinary Marine Hyaluronics holds a Guru Score of 87%. That is our read on how warmly the experts talk about it, based on the verdicts of 6 expert reviewers we have collected. It is also Guru Certified, our mark for products that hold broad approval across many expert reviewers.

What is The Ordinary Marine Hyaluronics good for, according to the experts?

In their reviews, experts say The Ordinary Marine Hyaluronics is good for skin barrier support (2 experts), dehydrated skin (2 experts), rough or uneven texture (1 expert) and fine lines and wrinkles (1 expert).

Is The Ordinary Marine Hyaluronics good for skin barrier support?

2 experts who reviewed The Ordinary Marine Hyaluronics say it is. Cassandra Bankson put it this way: “This is a wonderful serum for hydration and to help repair a damaged skin barrier.”