Do vitamins help prevent thinning of hair?

Q: I want to know what is the remedy for thinning of hair? I had read somewhere that taking supplements of Vitamin A and E help in strengthening the hair roots and promote growth of new hair. If true, what is the potency I should start with?

A:Yes, you could take vitamin A 25000 units per day and vitamin E 400 per day though thinning is usually hereditary or thyroid disease could have an association.