I get asked often about why my beard grows so thick and this is always what I recommend. I have tried many vitamins in my life whether it be multivitamins, ancient remedies or juices but I really have never noticed a difference in my body. This is just personally because in no way am I a doctor but there is one that I know works absolutely for sure. BIOTIN... Ever since I started taking Biotin my hair, nails and beard all started growing much faster. It is the one vitamin I swear by and take daily. Try it out and leave your thoughts. Cheers.
I have never tried any others but this is the exact one I recommend and the link where to purchase.