Infants under 1 year of age need 400 IU of vitamin D per day, children over 1 year of age need 600 IU of vitamin D. Adults need 400 IU of vitamin D per day, which can be increased to 600 IU of vitamin D per day for the elderly.
Vitamin D cannot be synthesized directly by the human body and is mainly consumed through sun exposure, food, and supplementation with oral medications and supplements. Vitamin D can promote the absorption of calcium and phosphorus from food in the small intestine, which can help children’s bone growth and strengthening, and prevent the occurrence of rickets in children. Simply food and sun exposure are not enough to supplement sufficient vitamin D, so it is necessary to rely on oral medication and nutritional supplements.
Vitamin D is easily poisoned by excessive intake, if you need to use it, please be sure to consult a doctor to find out the level of vitamin D in the body, and those who are deficient need to use it under the guidance of a doctor.