Vitamin D supplements are dietary supplements available in both D2, or ergocalciferol, and D3, or cholecalciferol, formats; both forms work to increase the amount of vitamin D in the blood, according to the National Inst... More »

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The most effective supplement version of vitamin C is ascorbic acid. However, as of 2015 studies show that nutrients in supplement form do not provide the same health benefits as a diet rich in fruits and vegetables, say... More »

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Vitamin D supplements are fat-soluble and should be taken with a meal for better absorption, reports WebMD. As of May 2010, a study proved that people who take their vitamin D supplement with the largest meal of the day ... More »

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The daily recommended vitamin D intake is 600 international units, or 15 micrograms, in men and women between the ages of 19 to 70, according to the National Institutes of Health. The recommended daily value for men and ... More »

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Generally, women do not need more vitamin D than men as the recommended daily amount is the same for both at 600 international units (IU) per day, reports the U.S. National Institutes of Health. The same daily nutritiona... More »

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Vitamin D3 helps the human body to absorb calcium, and vitamin D3 prescriptions and supplements are often used when a patient has a deficiency that prevents the body from using calcium effectively. It is often used to tr... More »

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Labdoor ranked Carlson Labs Vitamin D3, Nutrigold Vitamin D3 Gold 1000 IU, Nutrigold Vitamin D3 Gold 2000 IU, Nature Made Vitamin D3 and Nature's Way Vitamin D3 as the top five highest-quality vitamin D3 supplements out ... More »

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