How much should baby D3 not exceed in a day

The daily intake of vitamin D3 for infants usually does not exceed 400 international units. Vitamin D3 is a key nutrient that promotes calcium absorption, and excessive supplementation may lead to adverse reactions such as hypercalcemia. The dosage of infant vitamin D3 supplementation is mainly influenced by factors such as feeding method, sun exposure time, and growth and development stage. Breastfeeded infants typically require a daily intake of 400 international units of vitamin D3, as the vitamin D content in breast milk is lower. Infants fed formula milk may not require additional supplementation if their daily milk intake exceeds 1000 milliliters. Premature or low birth weight infants may need to adjust their dosage according to the doctor's advice. In rare cases such as congenital vitamin D metabolism abnormalities or children with chronic kidney disease, higher doses of vitamin D3 may be required for treatment, but strict adherence to medical advice is necessary. Long term daily intake exceeding 1000 international units may increase the risk of poisoning, manifested as symptoms such as decreased appetite, polyuria, and irritability. Parents should choose vitamin D3 supplements purchased through legitimate channels and avoid using multiple supplements containing vitamin D at the same time. During the supplementation period, pay attention to observing the baby's mental state, urination status, and weight gain trend. It is recommended to conduct regular child health check ups and evaluate the effectiveness of supplementation through serum 25 hydroxyvitamin D testing. Doctors will adjust the supplementation plan based on the test results. Outdoor activity time can be appropriately increased in daily life, but direct sunlight should be avoided and physical sun protection measures should be taken to protect the delicate skin of infants.