SkinFix

SkinFix 15% Vitamin C and Ferulic Acid Serum.

Serums

About this product

A lightweight serum formulated with THD-derivative vitamin C (15%), peptides, and supporting antioxidants designed to provide vitamin C benefits without irritation, especially for sensitive skin.

Full ingredients

Aqua/Water/Eau, Tetrahexyldecyl Ascorbate, Glycerin, Isopentyldiol, Aloe Barbadensis Leaf Juice, Hydrogenated Lecithin, Polyglyceryl-10 Laurate, Oligopeptide-1, Oligopeptide-2, Hexapeptide-11, Oligopeptide-3, Sclerotium Gum, Ferulic Acid, Propanediol, Tetrahydrodiferuloylmethane, Jojoba Oil/Macadamia Seed Oil Esters, Tocopheryl Acetate, Trisodium Ethylenediamine Disuccinate, Squalene, Caprylyl Glycol, Tocopherol, Polyglutamic Acid, Amylopectin, Pentylene Glycol, Citric Acid, Phytosteryl Macadamiate, Lecithin, Lithothamnion Calcareum Extract, Acetyl Glutamine, Lactic Acid, Phytosterols, Acetyl Tetrapeptide-2, Bacillus/Soybean Ferment Extract, Xanthan Gum, Sodium Hyaluronate, Folic Acid, Ethylhexylglycerin, Potassium Sorbate, Sodium Benzoate, Phenoxyethanol

Guru Score

77%

Yay

3 experts · Moderate agreement

What they liked

Lightweight milky texture, non-irritating
Gentle enough for sensitive skin
Peptides boost results

What they flagged

Pricey at $69

What the gurus are saying

This serum stands out for combining a gentler type of vitamin C with peptides to boost results, using a lower concentration and different pH that doesn't irritate sensitive skin; the experts found this thoughtful approach surprisingly rare. The formulation earned thumbs up from reviewers who noted it hits all the key targets without the stinging typical vitamin C serums bring. At $69, comparable options are hard to find.

Synthesized from 3 expert reviews · most recent take August 2026

Best for

Sensitive skin

Type

SerumsDrops & dropper

Key actives

Vitamin C Hyaluronic acidAHAVitamin EPeptides

Formula notes

Fragrance-freeNo drying alcohol

Where to buy

Sephora → Ulta → Amazon → Google →

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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

Darnell Cox | 50+ Healthy Aging Expert

55k subs

✓Yay

"If you're using peptides, you can switch to a THD derivative vitamin C like this one by Skinfix. It's great for sensitive skin because it's only 15% vitamin C with a different pH balance than an L-ascorbic acid, and I love it."

All 4 takes from Darnell Cox | 50+ Healthy Aging Expert

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"This is by Skinfix. I also love this. It's a brightening from 15% vitamin C serum, but it's a THD derivative. So it plays nicely with peptides. [...] This is morning. This really helps with all of the pollutants. It's accumulative for sun protection. So it's not the same as an SPF. That's definitely our last step, but it does help to increase the resiliency of the skin and better protect it from environmental stressors, including the sun."

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"I love Skinfix's vitamin C because it's not an ascorbic vitamin C, it's a THD derivative at a different pH balance, so it plays more nicely with peptides when you start layering in the ultimate skincare routine."

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"The Skinfix Brightening Firm 15% Vitamin C Serum is a great alternative if a stronger vitamin C stings your face or gives you a rash, or if you have rosacea. It's a little less irritating and better formulated for people who also want to use peptides, since you don't want to break a peptide bond with a very strong vitamin C. I use it on my neck because my neck has more fragile skin than my face."

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The Budget Dermatologist

724k subs

✓Yay

"So overall, I give the formulation of this product thumbs up. It is very thoughtfully formulated and hits a lot of the targets and the key points that I look for when I'm reviewing vitamin C serums, which actually is hard to find. So I am very impressed by that. [...] The texture is very nice, just a lightweight milky serum that does not feel stinging or irritating when I put it on my skin. And I am a sensitive skin person. So this definitely passes the test there."

No BS Beauty

89k subs

✓Mixed

"And then it contains curcumin, which is [...] related to turmeric. [...] We've got peptides in there, squalane, polyglutamic acid. Looks like it's fragrance and alcohol-free. It is on the pricier side. If your skin tolerates regular ascorbic acid, in my opinion that's the most proven studied type of vitamin C. The derivatives are a whole another thing. I trust ascorbic acid. I'm not so sure that all these other types are going to end up being proven to be as beneficial."

What the evidence says.

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

Vitamin C

Topical vitamin C is an antioxidant with reasonable evidence for dullness and uneven tone. It breaks down in light and air, so how a product is formulated and packaged matters as much as the percentage on the front.

Source: DermNet

Alpha hydroxy acids

Alpha hydroxy acids loosen the bonds holding dead cells at the surface. The evidence supports smoother texture and more even tone over time, and they can leave skin more sensitive to sun.

Source: NIH, National Library of Medicine

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 SkinFix 15% Vitamin C and Ferulic Acid Serum?

A lightweight serum formulated with THD-derivative vitamin C (15%), peptides, and supporting antioxidants designed to provide vitamin C benefits without irritation, especially for sensitive skin.

Is SkinFix 15% Vitamin C and Ferulic Acid Serum worth it?

Mostly yes. 2 of the 3 gurus who reviewed it give it their stamp of approval, for a Guru Score of 77%.

What is SkinFix 15% Vitamin C and Ferulic Acid Serum's Guru Score?

SkinFix 15% Vitamin C and Ferulic Acid Serum holds a Guru Score of 77%. That is our read on how warmly the experts talk about it, based on the verdicts of 3 expert reviewers we have collected.