Nature's Bounty Advanced D3 + Magnesium Citrate Immune Formula is a unique supplement for supporting immune system health.* According to National Health and Nutritional Examination Survey (NHANES), most Americans don't get enough Magnesium and Vitamin D from the foods they eat. Just one tablet of Nature's Bounty Advanced D3 + Magnesium Citrate provides a potent combination of 6300 IU of Vitamin D3 and 100 mg of Magnesium as Magnesium Citrate to help optimize Vitamin D levels in the body.* Getting enough Magnesium daily assists in converting Vitamin D to its active form, which helps support immune health. Our unique, two-in-one formula uses Vitamin D3 and Magnesium Citrate, which offer superior absorption and bioavailability. To help fit dietary and lifestyle needs, these Magnesium Vitamin D3 tablets are non-GMO, gluten-free, lactose-free, and contain no sodium or artificial colors, flavors and sweeteners. Like all Nature's Bounty products, Advanced D3 + Magnesium Citrate Immune Formula is backed by 50 years of quality, science, and great ingredients. Each bottle contains 90 tablets. *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Vitamin D3 is a more bioavailable form compared to D2. Magnesium Citrate is a more bioavailable form compared to other forms including Magnesium Oxide. Made in USA (with select ingredients from around the world) For adults, take one (1) tablet daily, preferably with a meal. ©Natures Bounty