Tyrosine is an amino acid that is involved in the production of melanin, the pigment that gives colour to the skin and hair.
I was browsing in a health food shop recently, and noticed a bottle of this supplement which claimed on the label that it is helps with skin pigmentation. I have not found much evidence on the web that Tyrosine has improved pigmentation in vitiligo cases, but if anyone has noticed an improvement from it I would be grateful to get a comment.
It's usually better (and probably cheaper) to get these molecules by eating the right foods rather than buying supplements.
Food sources of Tyrosine are:
soy products, chicken, turkey, fish, peanuts, almonds, avocados, milk, cheese, yogurt, cottage cheese, lima beans, pumpkin seeds, and sesame seeds. (these are high protein foods).