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Helps Maintain Strong Healthy Bones & Supports Immune HealthDietary SupplementNon GMOVegetarianGluten Free100% Purity & Potency 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.