A BMI under 18.5 is considered unhealthy. There is risk that you are not getting sufficient nutrition (malnutrition). Complications of malnutrition include anemia, nutrient deficiency, heart irregularities, loss of menstrual periods in women (amenorrhea), cavities, and osteoporosis.
Author: Healthwise Staff Medical Review: E. Gregory Thompson MD - Internal Medicine Brian D. O'Brien MD - Internal Medicine Kathleen Romito MD - Family Medicine Martin J. Gabica MD - Family Medicine Rhonda O'Brien MS, RD, CDE - Certified Diabetes Educator
Medical Review:E. Gregory Thompson MD - Internal Medicine & Brian D. O'Brien MD - Internal Medicine & Kathleen Romito MD - Family Medicine & Martin J. Gabica MD - Family Medicine & Rhonda O'Brien MS, RD, CDE - Certified Diabetes Educator