Im concerned about my weight so I would rather take the supplement than eat all those unneccessary calorie from intaking the biotin through foods like breads and cereals. It takes about 3 months to notice results .and you have to take everyday.i will be taking it for 2 year until I reach my hair goal.Also a bottle cost 5 dollar at walmart for 120 capsule,so what do u have to lose.air grows. Thatâs what it does. Biotin makes your hair STRONGER so it CAN grow, which is not the same. Taking biotin and not doing anything else for your hair will be just as unproductive as doing nothing to care for your hair.