Which vitamin is essential for calcium absorption in the human body?

Vitamin D is essential for calcium absorption in the human body because it plays a crucial role in maintaining the correct levels of calcium and phosphate, which are necessary for healthy bone development and maintenance. When the skin is exposed to sunlight, it synthesizes vitamin D, which then enhances the intestines' ability to absorb calcium from dietary sources. Consequently, sufficient vitamin D levels are vital for ensuring that the calcium consumed through food is adequately utilized by the body to support various health functions, including bone health.

Without adequate vitamin D, the body cannot absorb calcium effectively, which may lead to conditions such as rickets in children and osteomalacia or osteoporosis in adults. This highlights the importance of vitamin D in the process of calcium metabolism and overall skeletal health.