Niacinamide

The ordinary has a very high percentage (10%) many studies has shown that a 4-5% niacinamide is effective and anything above would just have a higher chance to irritate your skin. Also TO has 1% zinc in it, it also could be that.

maybe the ordinary percentages is too high for you,im not sure if your skin didn’t suit the niacinamide or the big percentages,but i think purito doesn’t contain big percentages of niacinamide and shoul be fine to your skin

I'm still figure out how niacinamide gonna works on my skin either

I experience the exact same with The ordinary serum but using the purito was perfectly fine for my skin! So I would say give it a shot!!

try using serums with lower percentage of niacinamide. maybe the purito serum will suit you .