For faster hair growth can i consume 5000mg biotin , prenatal or folic acid , multivitamins, 3000mg fish oil pills daily? is is safe?

Yes, safe but...: Taking all of the things you mention is quite safe. However, there is no guarantee this will result in faster hair growth; if you are deficient in any of those (which is actually quite common) then it should help somewhat; if not deficient then it won't do much for your hair but may still have other health benefits. See http://bit.Ly/18xyule for more re: benefits of vitamins.