In June, my rheumy recommended I take several individual Vit. B tablets every day. One of them is Biotin; I take 1,000 mcg (micrograms) daily split into two doses: ? tab in a.m. and ? tab in p.m. I didn't have a problem with hair loss but my nails broke easily. I noticed in late September that my nails were no longer breaking off; they're a lot stronger now.