I would think it would work because alot of conditioners have biotin in them. but if u have tablets, then you have alot of fillers so i am unsure of the potency. a powdered form would be good. I am going to do the same thing with my MSM powder i just bought. shoot i also own some biotin capsules too.. hmmm...
i just created a thread early this morning about a MSM recipe...i would reckon the same would apply to any mineral. The recommended percentage is 15% when u are making your potion and always dilute it in warm water first, or otherwise it won't melt. good luck!