The Vitamin D test measures the amount of Vitamin D in your blood. This is important, because every cell in your body has a Vitamin D receptor. These receptors act as receivers of Vitamin D which then switches, triggering vital functions such as immune strength, bone health, mood balance and more. Vitamin D is the only thing that can activate these switches. Without a steady supply of this essential nutrient, these functions will slow down, waver, and eventually cease to operate effectively. That’s why your body’s well-being hinges on Vitamin D. 

The only way to check your Vitamin D status is with a blood test.