Look at adding silica too. My hairdresser swears that adding silica to her biotin hair/skin/nails regime made a big difference. I'm looking at silica as one study I came upon noted the importance of orthosilicic acid to bone health and, as osteoporosis meds scare me, I hope to keep my internal scaffolding at no worse then mild osteopenia even if it makes cutting way down on coffee a good idea.