Yeah...I'm not sure about your an acidic body being the cause of hair loss...
Dr. Schultze has been into nutrition since early on and he follows a mostly raw diet with superfoods, regular detoxing ,etc and he is bald as a bowling ball!
I know some other people that have been following alkaline/raw dieting for years and they are balding while some of my other friends eat junk food, drink lots of alcohol, smoke, (they are probably about as acidic as you can get) and they have thick thick hair.
Hair loss certainky seems to have a great deal to do with heredity.