eyelash growth

I am nearly seventeen, and I am not pregnant. As a matter of fact, I am even on a birth control medication.

I would like to grow my hair very long. I have researched online and found that taking prenatal vitamins often gives positive results in growing long, healthy hair.

Although, I do wonder: is this a safe method? especially considering the fact that I am already on a birth control medication; could this in any way be harmful?

Is it safe to take prenatal vitamins for hair growth?