The Vitamin D Test is a quick and easy way to screen for Vitamin D deficiency. Vitamin D is important for the body to absorb calcium, iron, magnesium, phosphate, and zinc. It also plays a crucial role in supporting the immune system, bone health, and overall well-being. There are two main types of Vitamin D: D3, which the skin makes when exposed to sunlight, and D2, which comes from food. Having low Vitamin D is a global problem and can lead to serious health issues like weak bones, multiple sclerosis, heart problems, pregnancy issues, diabetes, depression, strokes, autoimmune diseases, infections, cancer, Alzheimer's, obesity, and higher mortality. Vitamin D is processed in the liver and measured as 25-hydroxy Vitamin D in the blood. This level shows how much Vitamin D one has. When the test line is light, it indicates a high level of Vitamin D in the blood, and conversely, a darker line indicates a lower level. A control line always appears to show the test is working properly. Results are compared with a color card provided in the kit.