OSEA Hyaluronic Acid C Serum: a Guru Score of 83%

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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✓Mixed

"This is a nice hyaluronic acid serum. I love marine ingredients, algae ingredients work really well for my skin, but it's an expensive product, 88 dollars for one fluid ounce, [...] it will be 44 dollars in this sale. If you enjoy it, pick it up at that price, but for me I stopped buying this kind of product because we can find so many better prices in K beauty."

Cassandra Bankson

2.46M subs

✓Yay

"This is one of my favorites if you're looking for skin support and hyaluronic acid hydration. This almost feels like a cactus serum that I've used before but this easily absorbs into the skin and it really helps with fine lines and wrinkles and hydration and it makes the skin glow. The fact that this is fragrance free, [...] we normally don't see a lot of luxury priced products being fragrance free nor do we see them being made in California and made ethically and sustainably."

Top Pick: seaweed serum

All 2 takes from Cassandra Bankson

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"This is one of my favorites if you're looking for skin support and hyaluronic acid hydration. This almost feels like a cactus serum that I've used before but this easily absorbs into the skin and it really helps with fine lines and wrinkles and hydration and it makes the skin glow. The fact that this is fragrance free, [...] we normally don't see a lot of luxury priced products being fragrance free nor do we see them being made in California and made ethically and sustainably."

15 Best and Worst Hyaluronic Acid Products and How They Work

"This is so good, but it's completely vegan and cruelty-free. [...] A lot of the benefits that I'm getting from this product actually come from the fact that there are other ingredients in here like seaweed extracts and the snow mushroom that is really doing a lot for the skin. But in addition to those two forms of hyaluronic acid, this actually hydrates and actually plumps the skin. This absorbs and it feels so good."

Allie Glines

829k subs

✓Yay

"This is so luxurious the way that it just makes your skin look and feel so bouncy, so hydrated, so plump, it's insane. This serum is clinically proven to minimize the appearance of fine lines and wrinkles. It's also clinically proven to increase hydration, which it sure does, and it's going to give you a more lifted and firm look to the skin, which I love so much, especially before makeup."

What the evidence says.

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

Frequently asked.

What is OSEA Hyaluronic Acid C Serum?

A marine-based serum with hyaluronic acid in two molecular weights, seaweed extract, snow mushroom, and volcanic marine ferment, designed to hydrate and minimize fine lines.

Is OSEA Hyaluronic Acid C Serum worth it?

Mostly yes. 2 of the 3 gurus who reviewed it give it their stamp of approval, for a Guru Score of 83%.

What is OSEA Hyaluronic Acid C Serum's Guru Score?

OSEA Hyaluronic Acid C Serum holds a Guru Score of 83%. 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.