Kidney Damage: Think of the kidneys as filters: They process blood, getting rid of impurities to keep the body healthy. But regular vomiting and/or not eating and drinking enough can cause the body to be in a constant state of dehydration, making the kidneys work overtime to maintain normal levels of salt, water, and essential minerals in your blood. As a result, waste builds up, weakening these essential organs.
Body Hair Growth: For women, eating disorders can be the result of coping with stress in an unhealthy way—and one of the signs that there's a problem is excessive hair growth on unexpected areas of the body, such as the face. This is the body's attempt to keep warm after it receives the brain signal that it's being starved (common with anorexia), since a healthy diet plan is key to maintaining proper hair and nail growth. Meanwhile, hair on the head can become brittle and thin out.
Infertility: Extremely low body fat can cause amenorrhea—which is a medical term for no longer getting a period. It works like this: In the absence of a healthy diet plan, the body doesn't receive enough of the calories it requires to function properly, resulting in a hormone fluxuation that interferes with regular menstruation cycles.
Osteoporosis: Over time, bones can weaken due to malnutrition. For women, eating disorders increase an already high chance of suffering from bone damage. The International Osteoporosis Foundation estimates that 40 percent of Caucasian women in the US will develop the disease by age 50 (the likelihood is increased for African-American and Asian-American women)—and that's without adding the stress of an eating disorder. A healthy diet plan with calcium (found in milk, yogurt, and spinach) plus vitamin D (which you can get in a supplement—or from the sun) is essential to keeping bones strong.