Question: what is the best supplement to improve skin?
Answer: Vitamin E. Vitamin E contributes to the protection of cells from oxidative stress, which can help protect against premature ageing and wrinkles as well as improve the appearance of scars and imperfections. ... 
Biotin. ... 
Iodine. ... 
Niacin. ... 
Riboflavin. ... 
Vitamin A. ... 
Vitamin C. ... 
Zinc.