Which Vitamin is Better for Hair Growth Folic Acid or Biotin?

There are no vitamins that target hair growth.  If you live in a civilized country with a normal (even a bad) diet, chances are you don't have vitamin deficiency.  Many companies and good marketing programs will try to convince you otherwise.  

Both are believed to be important for hair growth, however not much science is available to back up any one vitamin, herbal, or supplement.  It is important not to squander money on un-backed claims or anything without a strong foundation of science behind it.   Ideally your physician can give you more detail on this.

Neither of these vitamins will impact hair growth one way or the other. I don't recommend that my patients take any supplements.