Is L-Ascorbic Acid safe during pregnancy?

Vitamin C neutralises free radicals generated by UV and pollution, which is why it is usually recommended in the morning under sunscreen rather than as a replacement for it.

It is a required cofactor for the enzymes that build collagen, and it inhibits tyrosinase, the enzyme that drives pigment production — hence the brightening reputation.

Typical use on shelf: 10%–20% in water-based serums, often with vitamin E and ferulic acid for stability..

• It oxidises. A serum that has turned deep orange or brown has lost potency — packaging and a purchase date matter more than the percentage.
• Concentrations above 20% do not add benefit and do add sting.
• Gentler derivatives (sodium ascorbyl phosphate, ethyl ascorbic acid, ascorbyl glucoside) are more stable but have thinner evidence.

One ingredient rarely decides anything. Paste the full list from each product you use into the pregnancy ingredient checker and take the flags to your clinician. The full write-up on L-Ascorbic Acid — what it does, irritation, pore-clogging risk — is on the L-Ascorbic Acid explainer.