I know someone who takes large biotin dosages daily, picks it up at Walmart and has it as part of her vitamin routine. Her hair thinning was not caused by medication to my knowledge, but rather by decades of bleaching it, poor nutrition and then reaching middle age and teetering in and out of beginning menopause. However it does work for her. It's one of the few 'home remedy' type things that I have ever actually seen work.