 | Vitamin D, an essential vitamin/hormone produced in the skin by ultraviolet radiation, is essential for calcium balance, bone density, immune function, and proper cell growth. Recent research suggests many individuals may be vitamin D deficient, especially those who do not get enough sun exposure, including people in northern latitudes. Many deficient individuals may need 5,000 I.U. daily to replenish tissue stores.
Most vitamin D products on the market contain hidden preservatives. Thorne's D-5000 provides 5,000 I.U. per capsule of pure vitamin D, with no preservatives.
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