Hope Doesn't Cause Acne!
Some reviews say biotin can cause acne! Have been using it for 5 days and already have 2 pimples!  Will continue to use for a few more days and drink more water to see if skin clears! Hope so, in my early 60's with clear skin!  Intent was to use in combo with Revprorene to improve hair and nail growth.  Will update review in a few weeks/months.
Rating: 3 stars