Dietary means should always be the first and best way to achieve adequate nutritional intake. However, for some nutrients there are very few substantial dietary sources, such is the case with Vitamin D. Vitamin D is a very unique vitamin in that it can be synthesized in the skin with exposure to sunlight for as little as 10 minutes per day, which is dependent on latitude, altitude, season, cloud cover, ozone levels and other factors. Vitamin D supplements may be needed by elderly people with limited sun exposure, people living in northern latitudes, dark-skinned African Americans, Asian Indians living in the western hemisphere, avid sunscreen users as well as people with gastrointestinal issues. Sunny Gummies? Vitamin D3 contain high-potency vitamin D for those looking to support bone and muscle strength, immune function, along with circulatory and cellular health.* Higher intakes of vitamin D may be associated with long-term and enhanced immune resistance, and other health benefits*. Vitamin D3 is the most