Hello
It can be done, but it has to be weighed. to control the use at a rate that does not exceed that of the manufacturer / D.O. Defined by
Alpha Arbutin can be used not more than 2% of the formula. will be harmful to the skin
2.Take the powder
วิตามินบี3 be mixed with lotion for one time use or not
. such lotion Are there any ingredients that are incompatible with
Vitamin B3 ? If not, no problem. can be filled but under the above terms as well It means that you must not use more than the manufacturer's specifications. If you use it in excess, it can be harmful to your skin.