Prenatal vitamins for hair growth??? Has anyone tried and does it work?

Let me know if prenatal vitimans help grow hair at all? IM 13 and I would say im too young to take those vitamins. . . but just wondering if I could, what would be the risk if there are other types of vitamins designed to help hair grow more? quickly, that would be of great help. I heard that biotin helps too perhaps? However, something healthy and what? cheap that I can take to make my hair grow more? quickly?

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