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Vitamin D (ergocalciferol-D2, cholecalciferol-D3, alfacalcidol) is a fat-soluble vitamin that helps your body absorb calcium and phosphorus. Having the right amount of vitamin D, calcium, and phosphorus is important for building and keeping strong bones.
B3 (Niacin) One of the primary uses for niacin is to boost HDL cholesterol (i.e. the good cholesterol). And the higher a personâs HDL, the less bad cholesterol he or she will have in their blood. Vitamin B3 deficiency is very rare in developed countries, though alcoholism has been shown to lower B3 levels in some individuals.