A daily dose of Vitamin D3 by Nature's Bounty is a simple and effective way to show your immune system some love. That's because Nature's Bounty Vitamin D is an essential nutrient for immune support. By assisting with calcium absorption, Nature's Bounty Vitamin D3 also helps maintain healthy bones in adults and it provides the benefits of the natural sunshine that living and working indoors can deprive us. Vitamin D3 Softgels from the vitamin experts at Nature's Bounty combine science, nature and 50 years of expertise and innovation to provide the easiest way to increase your daily intake of this important nutrient. , Ingredients - Vitamin D (As D3 Cholecalciferol) , Storage Instruction - Store at 18-23 degrees C