How much biotin should I take and does any hair pills work for you?

SakuraChii
How much biotin pills should a 15 year old take? Before I had only one for 2 months and I got a lot of new growth yet my hair is still neck length. I have a 1000 type of biotin pills. Also any reviews? Does biotin work?
How much biotin should I take and does any hair pills work for you?
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