Lactation is the production of breast milk to nourish infants for the first 6 months. Breast milk provides perfect nutrition for babies and lowers risks of infections, allergies, obesity and more. It also aids bonding and helps mothers' health by contracting the uterus and easing weight loss. Nutrient requirements increase during lactation, especially calories by 500 per day, protein, vitamins A, C and the B complex, calcium and fluids. Mothers should eat a balanced diet, check with their doctor before using medications and limit caffeine.