Do we still need to supplement D3 to supplement AD

Supplementing vitamin AD preparations usually does not require additional supplementation of vitamin D3. Vitamin AD preparations already contain a complex of vitamin A and vitamin D3, which can meet daily needs at regular doses. Excessive supplementation of vitamin D3 may lead to accumulation poisoning, which needs to be comprehensively judged based on individual nutritional status, sunshine duration, and doctor's advice. The vitamin D3 content in vitamin AD preparations is usually formulated according to the recommended daily dosage for infants or adults, and is suitable for preventing deficiencies such as rickets and night blindness. If the daily diet is balanced and there is sufficient sunlight, the skin can synthesize sufficient vitamin D3, and additional supplementation at this time may exceed the safe intake range. Special populations such as premature infants and osteoporosis patients need to adjust their dosage under the guidance of a doctor. In rare cases, combined supplementation may be necessary, such as when severe vitamin D deficiency is combined with absorption disorders. Doctors will develop a plan based on the results of blood calcium, blood phosphorus, and other tests. Long term use of antiepileptic drugs or abnormal liver and kidney function may affect vitamin D metabolism, and serum 25 hydroxyvitamin D levels need to be monitored to adjust supplementation strategies.

It is recommended to consume foods rich in vitamin D, such as seafood and egg yolks, and engage in moderate outdoor activities daily to promote skin synthesis. Before using vitamin AD or D3 supplements, it is recommended to consult a professional physician to avoid repeated supplementation that may lead to exceeding the limit. Regular physical examinations help evaluate nutritional status and adjust supplementary plans in a timely manner.