Promotes overall good health and well being Supports bone and muscle health Gluten-Free Kosher Vitamin D is called the "Sunshine Vitamin" because it is produced naturally by the body after exposure to 20 min - 1/2 hour of sunlight. Many people develop deficiencies due to lack of sun exposure, living in cold climates, and other reasons. Vitamin D is most well known for its contribution to joint and bone health by helping the body absorb calcium. It is especially important to maintain adequate Vitamin D levels in children, as we age, and when we are under stress. Vitamin D-3 is vital for many functions in our bodies. Vitamin D also influences a host of key biological functions vital to health and well-being.