How to supplement when 25-hydroxyvitamin D3 is low

Low levels of 25-hydroxyvitamin D3 require supplementation with active vitamin D. Oral medications such as calcitriol capsules and alfacalcidol can help supplement vitamin D, promoting calcium ion absorption in the small intestine and increasing bone mineral content. It is also advisable to get adequate sun exposure, as the skin contains 7-dehydrocholesterol, which can be converted into active vitamin D3 upon exposure to ultraviolet light, thereby enhancing calcium absorption. Additionally, timely calcium supplementation is necessary. In daily diet, consuming calcium-rich foods such as fish, shrimp, and shellfish can effectively provide calcium ions.