Vitamin D is a steroid vitamin, a group of fat-soluble pro- hormones that are best known for the role they play in supporting bone health and aiding in the absorption of calcium and phosphate from the gastrointestinal tract. A growing body of research highlights vitamin D’s important role in supporting other body systems, including cardiovascular and blood sugar balance, musculoskeletal strength, and neurological and immune function, enabled by vitamin D’s ability to target over 200 different genes throughout the body. At the same time, deficiency and insufficiency of this important nutrient has reached epidemic proportions around the world, making the achievement of optimal levels extremely important to overall health and wellbeing. Vitamin D3 50,000 IU is ideal for those who have difficulty achieving and maintaining peak vitamin D levels. This often includes elderly patients with low vitamin D levels, those with challenges in absorbing and maintaining vitamin D levels, and overweight patients with an elevated body mass index that impairs vitamin D circulation. For those who require an immediate boost in their vitamin D status, the vitamin D3 50,000 IU formulation is a convenient, effective way to get the substantial support they need.