Why choose D3? Puori made this product because there was no natural potent dose of a high-quality vitamin D product on the market allowing people to reach desired doses of vitamin D. Why should you take vitamin D3? Vitamin D is essential for several functions in the body and we can produce it ourselves when the sunlight hits our skin. However, since the sunlight isnt strong enough from September-March on the Northern hemisphere we cannot produce vitamin D in that period. Furthermore, sunscreen use reduces the natural vitamin D production. As a result, many people have inadequate levels of vitamin D in body part of the year and further it is challenging to get vitamin D through a typical western diet. All this results in many people developing insufficiency or even deficiency. Ingredient story The vitamin D in Puori D3 is extracted from lanolin, a natural component of sheeps wool. The wool is gently sheared from the sheep, without harming the animal, and undergoes a purification and cleaning process. A pre-state of vitamin D is then extracted from the wool. Radiation with UV light of the pre-vitamin D forms the active vitamin D, comparable to how sunlight initiate the vitamin D formation in our skin. Afterwards, the vitamin D is mixed with organic virgin coconut oil. Vitamin D is a fat-soluble vitamin and combing it with organic coconut oil improves the absorption process as vitamin D needs fats for its uptake. Benefits Calcium uptake and bone maintenance- the main function of vitamin D is the hormonal role it plays in regulating the blood level of calcium and phosphorus. Vitamin D increases the intestinal absorption of calcium and the release of calcium from bones to ensure a constant calcium level in the blood. Immune System - another function of vitamin D is the role it has in the immune system. Many of the cells that are important for an immune response need vitamin D to function. An example is killer cells which target bacteria and viruses. Muscle function - Vitamin D play a role in muscle function. Vitamin D receptors, which bind to vitamin D are found in the muscle, where it activates the synthesis of protein to maintain and build muscles. Vitamin D also plays a role in the contraction of muscles.