Does Taking Vitamin C, Thiamine And Niacin Lighten Skin Color?

Dear Doctor,

Does taking oral dosage of 1000mg Vitamin C (2 Celin(500 mg ) tablets ) every day for a peroid of 3 months result in a lighter body (which is covered by clothes) skin colour?

Does taking oral dosage of Thiamine and Niacin every day for a peroid of 3 months result in a lighter body (which is covered by clothes) skin colour?

Thanks

REgards

Arvind