See, I thought it was just a seasonal shedding.  Like, I wash every other day, sometimes every 3.  I do wear it in a pony tail a lot (5 kids, kinda have to sometimes, plus I work out 6/7 days a week).  So yeah I do damage it that way I know for sure.  I do straighten, but I use heat protectant.  I avoid brushing it at times because it freaks me out to see large amounts of hair come out.  But my hair is naturally frizzy/curly, and an all around general hassle.  So yep, I do damage it, but I still think I'm losing way too much.  I did have it trimmed last week, hoping that was make it ease up, and my hair dresser said it still looks the same to her and doesn't see any thinning (spotted a gray hair though..  ).. so I switched to Redkin shampoo to keep it healther.. ugh I don't know.  It's been about 1.5-2 months of this!

No help on the Biotin but wanted to ask if you are straightening, pulling hair into pony tail, brushing often, etc?  I know that is when my shedding is at it's worst.  Also seems to be a seasonal thing for me.  I do serious damage to our drains and my vacuum cleaner hates me 

re-posted this in a different spot.