am kinda like skinny and would like to gain some few kilos,since I have a fast metabolism I cannot quickly gain weight,so a friend of mine who is currently studying pharmacy,doin 3rd year suggested that I
use take Multivitamins,I might be having Thyroid problem or hypersecretion..so I would like to know what's the purpose of those multivitamins,will they help me in this process of gaining,if not what will!