causes of breakage of hair
A deficiency of vitamins B and E and iron may lead to hair breakage. Good sources of vitamin B include meat, poultry, milk, bananas and broccoli. Vitamin E-rich foods include nuts, salmon and spinach. Too little iron in your diet can also cause your hair to break off.
1 Scars that sometimes develop on the scalp may cause hair loss.  Thyroid problems, which are a common cause of scattered hair loss. Both an overactive thyroid (hyperthyroidism) and an underactive thyroid (hypothyroidism) can cause hair loss. Hair loss associated with thyroid disease can be reversed with proper treatment.