In between the loss of my husband and about 100 pounds, my hair fell out by the handfuls for months and months. I'd heard that meds can cause that too, but I've been on the same ones in the same amounts for a couple of years so I kinda ruled that out. Even my son-in-law, who's also my hair stylist, was alarmed by how much hair I was losing. So I started taking biotin supplements per his recommendation, and months later my hair has finally stopped falling out and new baby hairs are growing back in. My hair is a LOT thinner than it was but that's OK, it was always thick and hard to manage.