Maxi D3 3000 is your logical source for supplemental vitamin D. It supports calcium absorption in the gut and the mineralization of bones. It also supports the modulation of neuromuscular control and reduction of inflammation. Maxi D3 3000 is made with 75 mcg (3000 IU) of vitamin D3, the most absorbable form of vitamin d. That’s why you want vitamin D3 preferred over vitamin D2. Vitamin D is so important; many food products are fortified with it! If your goal is to have a certain amount, you can only really be certain with supplementation. While your body, with enough sunlight, can make its own D3, you would need to be in the sun every day. Not only that, as people age, the skin cannot synthesize vitamin D as efficiently. Those who are advised to avoid direct sunlight to protect their skin or keep covered for religious reasons, also benefit greatly from supplementation.