Hello, I want to ask what are the common reactions that may occur when using high percentage of niacinamide?
This is my first time trying such a high percentage niacinamide. What should I take note of?
P/s I have sensitive and oily skin
Thank you in advance 💚
1. Do the patch test - on the jawline or ear)
2. start using once a week first
3. then slowly upgrade to twice a week
4. well i don't usually use niacinamide serum everyday, so if you have sensitive skin it's better to use other hydrating or calming serum together
5. stop if you see any sign of irritation.
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