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Helps Maintain Strong Healthy Bones & Supports Immune HealthDietary SupplementNon GMOVegetarianGluten FreePurity & Potency 100% GuaranteeWhile studies show that 2 000 IU - 10 000 IU of vitamin D per day may be needed for optimal health most Americans get less than 400 IU. Vitamin D supports:Healthy Bones & Brain FunctionImmune & Cardiovascular SystemHealthy Blood Sugar LevelsBreast & Prostate HealthVitamin D also helps the body absorb calcium and deposit it into the bones.