Hair Growth Remedies

I am a vegetarian, and my hair doesn’t grow very fast at all. When I did eat meat, I didn’t have this problem, so I was wondering if there is a supplement I could take to not only increase my intake but stimulate my hair growth.
Does anyone know of a safe, effective vitamin or supplement?

I am a vegetarian, and my hair doesn’t grow very fast at all. When I did eat meat, I didn’t have this problem, so I was wondering if there is a supplement I could take to not only increase my intake but stimulate my hair growth.
Does anyone know of a safe, effective vitamin or supplement?