Drinking small amounts of carbonated beverages occasionally during breastfeeding has no effect on the child, but drinking carbonated beverages frequently will jeopardize the child’s health and lead to malnutrition or calcium deficiency, etc. 1. Malnutrition. Carbonated beverages contain phosphate, sodium bicarbonate, caffeine and other ingredients, breastfeeding mothers drink too much carbonated beverages, these ingredients will be absorbed into the body through the breast milk so that the baby, affecting the child’s gastrointestinal function, will cause the child to bloat, resulting in the child’s loss of appetite, anorexia and so on, which can lead to impact on the nutrient intake and absorption. 2. Calcium deficiency. Carbonated beverages contain phosphoric acid, into the body will affect the absorption of calcium, breastfeeding mothers often drink carbonated beverages will lead to their own calcium and phosphorus ratio imbalance, will also affect the calcium content of breast milk. If the mother herself is deficient in calcium, it will also lead to insufficient calcium supplementation for the child, thus causing the child to suffer from calcium deficiency and affecting the child’s height and bone development. It is generally recommended not to drink carbonated beverages during breastfeeding, and if you want to drink them, you can drink them occasionally in small amounts, but should not drink them frequently.