Good news/bad news regarding biotin. It worked great at growing hair.... I actually had eyebrows for the first time in years! But, I wound up with severe migraines. I have tried different brands and different strengths, but ended up with migraines each and every time. Just to let you know that some of us get negative side effects from biotin. I suffer from multiple chemical sensitivities.... not sure if this has anything to do with it or not.
Oh heck, I've been taking 1 x 1000mcg of biotin a day for two weeks now and have had headaches most of that time. I too have Mast Cell Activation Syndrome (MCAS) and chemical sensitivities. Perhaps I should stop taking it for the hair loss and split nails?
