Q. Can I use it during the day?
Ans. Yes, if the retinol level is mild — but always apply sunscreen. For stronger retinol, use only at night.

Q. Is it safe for sensitive skin?
Ans. It may cause irritation depending on retinol strength. Patch test recommended.

Q. Can I layer it with other serums?
Ans. Yes, but avoid layering with strong exfoliating acids at the same time.

Q. Does it help with dark spots?
Ans. Yes, Vitamin C and retinol together help brighten pigmentation.