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L-ascorbic acid 10–20% shows antioxidant and brightening effects in clinical trials.
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SKINCARE
• BACKED
Vitamin C Serum
RESEARCH
- L-ascorbic acid at 10–20% brightens, supports collagen, and boosts SPF performance.
COMMUNITY
- People like the brightening effect but frequently complain about serums oxidizing before they finish the bottle.
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SAFETYCan cause mild irritation or tingling at higher concentrations, especially alongside other actives like retinol.
WHAT THE RESEARCH SAYS
ALL 58 ON PUBMED ↗02
Formulation stability matters — opaque packaging and pH < 3.5 preserve potency.
view on pubmed ↗03
Pairs synergistically with sunscreen in photoprotection studies.
view on pubmed ↗WHAT PEOPLE SAY
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COMMENTS
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