A Vitamin D3 supplement suitable for vegans which is sustainable sourced from lichen. D3 is considered the best form of vitamin D to take as the body can readily convert it and utilise it. Vitamin D is important for many functions within the body and is important for people in the northern hemisphere and those that do not get much exposure to sunlight. Vitamin D is needed for maintenance of bones and teeth and normal muscle function. Vitamin D contributes to normal functioning of the immune system and inflammatory response. Vitamin D aids normal absorption of calcium and phosphorous.