Nicotinamide is an ingredient that can be used externally or internally, but you should check which method is appropriate before using it. Adults are advised to consume no more than 20mg of nicotinamide per day. Excessive use of nicotinamide does not increase the effect of use because it cannot be fully absorbed, but causes a burden on the body and affects normal function.
Nicotinamide is a very common one for topical use and can be added to lotions, creams, serums, sunscreens and other products. Nicotinamide added in such products is generally cosmetic grade nicotinamide, used in powder, tablet and other forms, but it is not recommended to add cosmetic grade nicotinamide in skin care products, why? This is because we can not control the dose and concentration of cosmetic grade nicotinamide, this simple and crude addition, is not conducive to the role of cosmetic grade nicotinamide play, or even counterproductive. If you want to use cosmetic grade nicotinamide in your skin care products, we still recommend that you purchase products containing cosmetic grade nicotinamide through legal channels.