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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.
Quick Overview. Vitamin D3 acts like a hormone in the body. Itâs main job is to increase the absorption or calcium in the intestines by 20x. Itâs a calcium mobilize and should never be taken alone.Always take vitamin K2 with D3 in a ratio of D3 10,000 IUs/K2 100 mcg. This is because vitamin K2 works with vitamin D to fully transport calcium to the bones.Taking vitamin D3 by itself can fill up the arteries and joints with excess calcium.itamin D3 acts like a hormone in the body. Itâs main job is to increase the absorption or calcium in the intestines by 20x. Itâs a calcium mobilize and should never be taken alone.