Serum
CeraVeSkin Renewing Vitamin C Serum
Vitamin C
Ascorbic Acid
Brightens tone and supports collagen, but it's unstable: it oxidises quickly and can sting on reactive skin.
Safe amount 2 studies cited
Most effective between 10-20%; higher isn't necessarily better
Technical data
Dose-response breakdown and source citations behind the rating above.
Safety by concentration
10 to 20%Use with care
Cited sources
Topical Vitamin C and the Skin: Mechanisms of Action and Clinical Applications
Al-Niaimi et al., The Journal of Clinical and Aesthetic Dermatology · 2017
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Frequently asked questions
Is Vitamin C safe?
Brightens tone and supports collagen, but it's unstable: it oxidises quickly and can sting on reactive skin. Most effective between 10-20%; higher isn't necessarily better