The most common cause for hair loss is iron deficiency. Iron deficiency is also known as anemia in medical terms wherein the body has a low iron level than what the body requires. Due to iron deficiency the number of red blood cells is reduced in the blood and result in a number of ailments. In most of the cases the person suffering from anemia will suffer extreme feelings towards hot or cold temperature (that is the person feels either too cold or too hot even at normal temperatures). This is because iron is used to maintain the body temperature. Due to iron deficiency in the body the hair begin to fall. The person who is suffering from iron deficiency also takes time to recover from blood loss.

More than 80% women suffer from some type of anemia. The common reason for iron deficiency is that there is insufficient iron in their diet. Iron is one of the key elements in creating red blood cells in the body. Due to fewer red blood cells the person appears pale (due to loss of pigmentation) and the hair follicles become weaker. The weakened hair follicles cause hair loss.

The best method for hair loss prevention due to iron deficiency is, to consume nutritious food containing high iron content. Doctors usually stress the patients to increase iron intake by consuming dried fruits, fish, legumes, meat, molasses, potatoes, dark green leafy vegetables, wheat germ, and grain products in the diet. Sometimes lack of vitamins in body can also cause excessive hair loss in women. Deficiencies in folic acid and vitamin B12 one of the causes for hair loss. For immediate recovery doctors usually give iron and vitamin pills. However these medicines are dangerous and should be consumed only after consulting a doctor.