L-Ascorbic Acid
Vitamin C, L-ascorbic acid
AStrong clinical evidence (multiple RCTs)Safety: Safe
Chemical Function
Antioxidant that neutralizes free radicals and supports collagen synthesis.
Scientific Evidence
RCTs demonstrate photoprotection and collagen-stimulating effects of 10-20% L-ascorbic acid.
Quality of EvidenceStrong
Interactions
Pairs with ferulic acid and vitamin E for stability; best used in the morning under SPF.
Pro-Aging Relevance
Protects against oxidative stress and brightens — key for radiance in mature skin.
The Science Behind L-Ascorbic Acid
L-ascorbic acid is the active form of vitamin C. It neutralizes free radicals from UV and pollution and tells fibroblasts to make collagen. It oxidizes quickly, so choose air-tight, dark packaging and use it fresh.
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