Q. Is a 20% niacinamide serum too strong?
Ans. This is a high concentration; start with 2–3 times a week and increase frequency as tolerated.

Q. Can it help with dark spots?
Ans. Yes — niacinamide supports fading uneven tone and brightening.

Q. Is it suitable for oily skin?
Ans. Yes — helps regulate excess oil and refine pores.

Q. Do I need sunscreen with this?
Ans. Yes — always use SPF daily when using active serums.