dietary supplementation
"I've been taking Biotin off and on for a few years and have noticed that certain brands seem to cause more headaches ...and for someone who never really gets headaches the ones I got after taking it were just unbearable... stopped taking it and no more headaches so my suggestion is to stick with a well respected brand and if you can, just buy a small bottle first to see if you have a reaction... on the plus side I did see an improvement in my skin.. oh, and maybe it's just me but I also noticed if I took it at night I had the most bizarre dreams "