Biotin is good, however a total B complex is better (including biotin). I tried biotin by itself and suffered from restless leg syndrom. When I cut out the biotin and started taking a B complex (with all the B vitamins in it), the restless leg syndrom went away.
I'm taking Centrum multi-vit, is that not enough B complex? Hair was still falling out by the handfuls until I added biotin. Out of my routine during the holidays, I've been forgetting the biotin and hair started falling out again, but got back on it the last few days and all good again.