8397fa35_ening_ingredients___WHITERskin__2
[0] Niacinamide [1] Vitamin B3, niacin, nicotinamide [3] In skin culture tests, niacinamide significantly inhibited the transfer of melanosomes from melanocytes to keratinocytes (by 25–45%; p activity. [4] Yes. [2] 
Inhibits melanosome transfer from melanocytes to keratinocytes.
List of commercial skin lightening / skin whitening ingredients | WHITERskin
2