Vitamin D3 also plays a role in regulating our immune and neuromuscular systems, as well as modulating our mood and sleep rhythms.Yet many people whether because we routinely wear sunblock, spend time indoors, have darker skin, or live in northern localesare deficient in vitamin D., , Our delicious Zero Sugar Vitamin D3 Gummies for adults are a convenient way to get expert-recommended daily vitamin D3, with no added sugar. Each gummy contains 1000 IU natural vitamin D3 (cholecalciferol), the most easily absorbed and utilized form of vitamin D.