125 mcg (5000 IU) Supports Strong Bone & Immune Health Immune Health Vitamin Supplement Your Sunshine Vitamin Guaranteed Quality Laboratory TestedNearly 50 Years of Trusted QualityAt Nature's Bounty, we are committed to your health. For nearly 50 years we have been making trusted product, backed by science, and made with only the purest ingredients....guaranteed. So you can get the most out of life every day.