Fast&Up Plant based Vitamin D3 is sourced from lichens, which is a vegan source of D3 available in refreshing lime and lemon flavor. Vitamin D3 is a fat soluble vitamin and is obtained from sunlight that helps the body absorb calcium and phosphorus. Having the right amount of vitamin D, calcium, and phosphorus is important for building and keeping strong bones and prevent bone disorders. It is also vital for women to prevent estrogen related bone loss and ease menstrual cramps. Vitamin D is necessary for the proper functioning of your immune system, which is your body’s first line of defense against infection and disease. It has both anti-inflammatory and immunoregulatory properties, and is crucial for the activation of immune system defenses. Deficiency of vitamin D3 can lead to bone related disorders like brittle bones, low calcium and phosphorous levels in the bone. It can also lead to weak immunity and low white cells in the blood. Since most D3 sources are animal based (sheep wool) and Lichen - vegan friendly source, hence it becomes very difficult for vegans to consume D3. As noted, getting vitamin D from the sun is not practical for many, therefore people must rely on consuming foods fortified with vitamin D or on vitamin D supplements. Available in Swiss effervescent technology and high bioavailability offering faster absorption. It does not contain any added sugar and is NON-GMO, gluten free and vegan.