The importance of vitamin D for human body has been described in more than 70,000 medical studies. It is necessary for improving overall well-being, regulates mineral metabolism in the body, reduces the risk of respiratory infections, helps to cope with nervous system disorders and even interacts with longevity genes.
At least 1/3 of the world's population still has a constant vitamin D deficiency. How can you tell if you are one of them?

If you notice signs of vitamin D deficiency, have your blood tested for vitamin D levels at any laboratory. This will allow you to accurately assess the severity of the problem and calculate the optimal dosage of vitamin D supplements.