Vitamin-d

This test is also known by other names, including 25(OH) D, calcidiol, or cholecalciferol test. It can be an important indicator of vitamin D deficiency, which can lead to osteoporosis (bone weakness) and rickets (bone malformation).

The 25(OH)D test is particularly useful for individuals at risk of a deficiency, such as those with limited sun exposure, people who eat a vegan diet, or people with medical conditions that make it difficult for the body to absorb nutrients from food or to convert vitamin D into a usable form.