not authentic [SEP] this niacinamide zinc the ordinary product from amazon is not authenticplease do not buy thisi was doubtful when i read the reviews on this but they were all right this in fact is not a genuine product i decided to purchase the same product from sephora and the differences are drastic first there is no gap on the fake of the bottle located below the cap the ridges are larger compared to the authentic onesecondly the code on the bottle of the fake one is missing there should always be a code on the bottle not the paper when i tried the fake one the serum itself left a weird sheen as if i left glue and eggwhites on my face it smelled like glue and was not pleasant the real one is a much thinner formula and had no odor at all it left my face looking better than the fake onei guess you could say the one from amazon was an imposter they didn t do their task right dang they re a good liar though photo sephora photo sephora photo amazon purchase