Considering that it contains hydroquinone and kojic acid it should lighten skin but to what degree is will depend on how often its used and the initial skin colour and sun exposure. However hydroquinone is highly unstable and can lead to darkening of the skin in the furture. If i were you i'd advise your mum not to use it and probably sell it as hydrouinone is banned in the usa,uk and japan which is clear enough that its not a good ingredient. Beauty shouldn't be worth more than health in my opinion.
I ordered ashe skin care products yesterday i ordered the whitening cream, whitening 3* mask, soap, gold facial thing which claims to turn u 2 shades lighter instantly i ordered these many products because if ur a international customer on $100 shopping shipping is free . I live in vancouver i recently went to La n vegas n i got so tanned i wana get rid of my tan i wanted to give this product a try. I used to use golden pearl beauty cream which was amazing but now they dont sell the same golden pearl in the market its a different formula which doesnt do anything for me Ill receive my products with in 8-10 days im so excited and nervous too hopefully it works ill let u guys know