What main ingredient should a skin bleaching product have?

i bought a product called cancha nacar...it contains glycerine,zinc oxide,ground barley, water, oyster shell powder,lemon juice, honey,witch hazel,bentonite,papain,irish moss powder, salicylic acid.... have you used this product for dark spots? how long til u saw results? thanks a bunch

What main ingredient should a skin bleaching product have?
I think you mean concha nacar. In Mexico and other countries they use it to help fade dark spots and to have an even skin tone. I have the soap, and it helped me with my dark spots, but what helped me a lot was wearing a good sunscreen. glycerine is used in skin whitening products, as well as lemon juice and salicylic acid (it's an exfoliator). It takes about a month to see results.





Most bleaching products contain hydroquinone, but watch out because it is said that causes cancer, and it should only be used under a doctor's supervision and in small quantities.
Reply:The main ingredient should be the doctor's prescription.