Vitamin D _____.

Question

Vitamin D _____.

Quizplus · Accepted Answer

According to the National Health and Nutrition Examination Survey (NHANES), blood levels of vitamin D among adolescents have declined in recent years.

Note: None of the statements given in the options are completely correct. Vitamin D is important for bone health as it helps in the absorption of calcium from the GI tract. It also helps in maintaining normal levels of calcium and phosphorus in the blood, which is important for various functions in the body. Vitamin D deficiency can cause an increase in parathyroid hormone levels, which can lead to bone loss. However, excess vitamin D can lead to hypercalcemia and can cause calcium to deposit in the soft tissues, leading to various complications. Vitamin D is not directly involved in oxygen delivery to tissues.