Answer:
Biotin 3,000 mu or iu of it. Skin hair and nails is vitamin with all essential vitamins BUT INCLUDES HIGH DOSE OF BIOTIN AND it is what makes hair grow. Growth is from internal factors, shampoo only once every 3 days use any shampoo and conditioner even the cheapest because it is the mega vitamin and a lot (3,000) biotin that actually makes it grow fast and nice.