He used infants from birth to six months. Studies were excluded if the formula contained long-chain polyunsaturated fatty acids, if there were supplements for the mother or infants, if there was breast milk contamination such as lead and mercury, or if the mother or child was ill at the beginning or at some point. increased risk of disease. Compelling and probable evidence was found in favor of breastfeeding on several outcomes. Breastfeeding may decrease growth and obesity in infants, help maintain normal blood pressure and serum cholesterol levels, and prevent diabetes in childhood. For every month a child was breastfed, their BMI decreased and their risk of being obese was reduced by 8%. Breastfeeding has been shown to cause a slight decrease in systolic blood pressure in children. Longer duration of breastfeeding may result in a lower risk of developing diabetes. Breastfeeding has also been shown to protect infants against overall infections, including gastrointestinal and respiratory infections..