Hello doctor I don t have any skin problem don t I am not too dark but I want to a fair skin than what i have now so i keep on trying the every other new skin lightening creams that come into the market but no use.Recently i started wondering if a facial cream really works on one s skin or is it just a marketing strategy.I think you skin reflects what u eat so it should be more internal rather than getting it through external means.If i have to use a cream what should be the purpose and what kind of cream should i use and also please suggest me what are the chemicals that i have to look at or avoid before buying a face cream.Please advise