Eat Right Practice Exam

Which vitamin is known for its role in bone health?

1. Vitamin C

2. Vitamin D

3. Vitamin A

4. Vitamin B12

The correct answer is: Vitamin D

Vitamin D is essential for bone health because it plays a crucial role in the absorption of calcium and phosphate in the intestines. These two minerals are vital for maintaining strong bones and overall skeletal structure. Without adequate vitamin D, the body is unable to absorb calcium effectively, which can lead to weak bones and an increased risk of fractures. Additionally, vitamin D helps regulate bone turnover by influencing the activity of bone-forming cells (osteoblasts) and bone-resorbing cells (osteoclasts). In contrast, while vitamin C supports collagen formation, which is important for the structural integrity of bones, it does not have the same direct impact on calcium absorption as vitamin D. Similarly, vitamins A and B12, although important for various bodily functions, do not play a significant role in maintaining bone density or health. Therefore, vitamin D's specific function in managing calcium levels and promoting bone strength makes it the vitamin most recognized for its contributions to bone health.