Meat and fish are the most common sources of vitamin D3 in the diet, and supplemental vitamin D3 is typically extracted from sheep's wool (lanolin) or other animal sources. For this reason, vitamin D3 supplements have historically not been suitable for either vegetarians or vegans. MRM vegan vitamin D3 is a unique micro-encapsulated vitamin D3 from cholecalciferol that is extracted exclusively from lichens, to meet calcium and bone health needs of both vegans and vegetarians. Necessary for the efficient utilization of calcium, this vegan-friendly D3 aids in the formation and maintenance of strong healthy bones. vitamin D3 also promotes immune function as well as supporting a healthy inflammation response. Numerous published research studies show that vitamin D3 (cholecalciferol) is the best possible form of vitamin d for the body. Guaranteed GMO-free, it is the world's only vegetarian society and vegan society registered vitamin D3, and contains cholecalciferol that is free from sugar, wheat, egg, gluten, peanut, tree nut, fish, shellfish, soy, and dairy products.