Hi sir, Appreciate your time. I am 28 years old. I have a Insulin Resistance Syndrome since 10 years (taking gluformin XL 1000 mg/day). When I was 7-8 years old my skin was too fair but after that my face, neck, under arms skin begin to become dark. So except above 3 parts my whole body is too fair and these 3 parts are too dark. Could you please tell any reason for above and also suggest a best solution if any.