The vitamins that stop facial hair growth are magnesium and zinc as well as vitamin E supplements.
Vitamin E supplements can help to stop facial hair growth and control the effects of androgen hormones and reduce the production of testosterone that can minimize facial hair growth in women.
Although there are no specific vitamins that directly influences the hair growth on chins.
Anti androgens are drugs that can help to block androgens from attaching to the receptors in the body.
The most commonly used anti androgen is Spironolactone or "CaroSpir and Aldactone".
A face cream called Vaniqa can also slow hair growth and slow facial hair growth by blocking a natural substance that is needed for the hair growth.
Electrolysis is another method of stopping facial hair growth by using electric current to destroy the growth center of individual hairs.
Laser hair removal can also be done to stop facial hair growth and remove unwanted facial hair.
Or you can also get injections called Gonadotropin releasing hormone agonists which lower the amount of androgen that are produced by your ovaries.