I am 42. I just realized that about 1/3 of my eyebrows have fallen out. Over the last 6 months I have had alot of hair loss when I shampoo. Other symptoms: periods are long, one day I will not bleed at all, the next I am gushing faster than my protection can handle, I get hugh clots; I have about 4 days prior to my period where I feel physically uncomfortable (bloating, aches, etc) and I have about a week or so where I am so tired that I don't want to get out of bed, I have irrational outbursts & don't like anyone or anything. This leaves me with about 6 days a month where I feel pretty much like me (however my husband says on those days I am even a little testy) It is obvious that my hormones are out of wack as I am obviously perimenopausal but has anyone experienced the eyebrow loss? What deficiency causes that?