Have you recently noticed thinning hair?  Did you move to a new city or new home.  It may be a good idea to have your water checked for Mercury levels.  Premature hair loss is one of the symptoms of having extreme levels of Mercury in your bloodstream.  Eating large quantities of seafood with high levels of Mercury can also lend itself to this widely experienced phenomenon.  Who would have known!  A study conducted by Dr. Jane Hightower details that symptoms associated with high levels of Mercury included dizziness, memory lapses, fatigue, sleeplessness, and hair loss! There are ways to treat the water levels and to help combat Mercury ridden water, including water filtration systems.  Although fairly expensive, it is of course well worth it.