Very light, sinks in without a trace, noticed a difference in just a few days. This is now my go to niacinamide product.

Total fan of sunday riley! I combine this serum with the vit c and it does wonders! Babysoft skin even though i have KP, gets rid of blemishes very fast and i think (just started using it) its brightening my pigmentations.

You probably can find the same for the less money but it is working for my hiperpigmentations spots, I mean, it is not a miracle worker but it is helping (with the vit C). 

Did nothing for me. I have been using it for a month. Didn't see reduction in sebum amount. In fact, I think it's the reason I'm breaking out. I do not recommend, there are better and cheaper options.

Best niacinamide serum I've tried so far. It doesn't break me out, doesn't make my skin feel oily.I see a reduction in pore size. I'm not a dermatologist but I like mixing one pump of this with one pump of Glow recipe watermelon glow niacinamide dew drops and top it off with La Roche-Posay Toleriane Sensitive Creme. So far(more that a month of using it) my rosacea looks better I do not have dry patches on my skin and my pores look significantly smaller.