Allies of Skin 20% Vitamin C Brighten & Firm Serum

Every take, in full

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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✓Approved

"Not the cheapest product out there, but I'd say it's the fastest acting vitamin C that I have ever tried. If anyone tells you that ethylated ascorbic acid is less effective, it's slower to work, wave this product in their face. This is ethylated ascorbic acid and it works quicker than any vitamin C I have ever ever tried. It is that good."

Top Pick: fastest acting vitamin c

All 3 takes from Mad About Skin

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"Not the cheapest product out there, but I'd say it's the fastest acting vitamin C that I have ever tried. If anyone tells you that ethylated ascorbic acid is less effective, it's slower to work, wave this product in their face. This is ethylated ascorbic acid and it works quicker than any vitamin C I have ever ever tried. It is that good."

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"I love the Allies of Skin one but it's close to 100 pounds."

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"I love the Allies of Skin vitamin C, which has glutathione in it. Glutathione is one of my absolute favorite hyperpigmentation ingredients."

Beyond50Skin

31k subs

✓Mixed

"I went through a ton of vitamin C. I went through the Allies of Skin 20% Vitamin C Brighten and Firm Serum. This is their formula with THD ascorbate, tetrahexyldecyl ascorbate, which is a vitamin C derivative so it's a little bit gentler than ascorbic acid. I typically have better luck with the ascorbic acid formulas for brightening, so that won't be a repurchase."

Nadine Baggott

164k subs

✓Approved

"The Allies of Skin vitamin C, slightly more expensive but I love it. It's a blend of L-ascorbic acid and other forms of vitamin C that have to be converted on the skin by your skin's enzymes naturally, so it takes slightly longer to deliver but actually makes it better for sensitive skin if skin's irritated by vitamin C."

Sincerely Miss Ash

195k subs

✓Approved

"This is so hydrating on the skin. It has a very nice unique texture and vitamin C, as you know, is a great ingredient to brighten the skin and also to protect your skin from pollution. It's a great antioxidant that I feel like a lot of people should incorporate. And because this uses a vitamin C derivative, it's a little bit more gentle than a pure form of vitamin C like ascorbic acid. The one great thing with derivatives is that you can pair these up with more ingredients without having to worry about conflicts. So because it has growth factors and peptides, then that serum can be used with this because this is a vitamin C derivative. And I love this. Not everybody can use vitamin C. Some people can't even use a vitamin C derivative, and these tend to be more gentle."

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All 3 takes from Skin Obsessed Mary

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"This is the 20% vitamin C brighten and firm serum. This has five different antioxidants to protect the skin and one of them, glutathione, is actually designed to also fight those fine lines and wrinkles. So this is brightening the skin, this is helping the overall texture and tone of your skin. This particular one is not water-based so it comes out in quite a thicker consistency. I personally love it, my dry skin really loves it, and it kind of just sits on the skin for a minute then starts to sink in almost like an oil. It's actually beautiful. It could be considered a little heavy for those with super oily skin. But this one I've used so many bottles of it and I find it deeply hydrating for the skin and it just feels good."

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"This is my vitamin C product, the 20% Vitamin C Brighten and Firm Serum. I really love this formulation and it has about a bazillion antioxidants for firming, for brightening, for protecting. I mean, you name it, it's all in here. They have two different vitamin C products and this is the only one I can get in Europe. They have a different one in America which is more like a water-based. This is not that kind of formulation, which is why I really like it. It goes on much thicker but it kind of melts into your skin almost like an oil. I think it's beautiful. It is deeply hydrating. It is fabulous. I love it."

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"I love this vitamin C and I think I've talked about it probably a hundred times on this channel. It's heavy, it's almost like a thick oil light texture. It's not for everyone but I love it and my skin loves it."

Common questions

Frequently asked.

What is Allies of Skin 20% Vitamin C Brighten & Firm Serum?

A 20% vitamin C serum with multiple antioxidants including glutathione, designed to brighten skin tone, firm texture, and protect against environmental damage.

Is Allies of Skin 20% Vitamin C Brighten & Firm Serum worth it?

Mostly yes. 4 of the 5 gurus who reviewed it give it their stamp of approval, for a Guru Score of 79%.

What is Allies of Skin 20% Vitamin C Brighten & Firm Serum's Guru Score?

Allies of Skin 20% Vitamin C Brighten & Firm Serum holds a Guru Score of 79%. That is our read on how warmly the experts talk about it, based on the verdicts of 5 independent expert reviewers we have collected. At least one expert has named it a Top Pick in its category.