Q. Can I use this serum on sensitive or post-procedure skin?
Ans. Yes — the formula is designed to support recovery and barrier repair, though a patch test is always recommended. Cosmetix.eu+1

Q. How often should I use this ampoule?
Ans. Morning and night after toner is ideal. Consistent use usually shows visible improvements in 2-4 weeks. Seoul Luma+1

Q. Will it help reduce dark spots and uneven tone?
Ans. Yes — key ingredients like niacinamide and c-PDRN target tone‐evening and repair, particularly in combination with proper sun protection. YuYoung International Limited

Q. Is this suitable under makeup?
Ans. Yes — after absorption you can follow with moisturizer and sunscreen, and then apply makeup as usual.

Q. Does it have strong fragrance or high irritant risk?
Ans. The formula is free of heavy fragrance and designed for soothing properties, which makes it more suitable for sensitive skin.