Last update: 2.5.2017.

The natural D vitamin

Supplement Watch - Vitamin D3

Other name(s) for Vitamin D3


General information for Vitamin D3

People synthesize vitamin D3 when UVB light from the sun strikes the skin. Also many fish are good sources of vitamin D3. Although vitamin D2 is accepted as a good alternative but D3 is the type to buy for several reasons For example D3 is the form that is produced when UVB light contacts our skin. Also many vitamin D3 is more difficult to overdose than D2. Vitamin D3 has been tested more in clinical trials. Vitamin D3 is more effective at raising and maintaining the vitamin D levels in the bloodstream.

Solubility of Vitamin D3


Take care when supplementing with fat soluble vitamins.

Benefits of Vitamin D3

Helps maintain normal blood levels of calcium and phosphorus, which strengthen bonesHelps form teeth and bonesSupplements can reduce the number of non-spinal fractures

Deficiency symptoms / disease


Overdose symptoms / disease

The threshold for vitamin D toxicity has not been established. There is defined a tolerable upper intake level however. Vitamin D overdose is rare and it is usuallyt caused by supplementing with high doses of vitamin D rather than sunlight exposure.

FDA information for Vitamin D3

(Daily value/Recommended dietary allowance/Adequate intake)

Recommended intakes of nutrients vary by age and gender and are known as Recommended Dietary Allowances (RDAs) and Adequate Intakes (AIs). However, one value for each nutrient, known as the Daily Value (DV), is selected for the labels of dietary supplements and foods. A DV is often, but not always, similar to one's RDA or AI for that nutrient. DVs were developed by the U.S. Food and Drug Administration (FDA) to help consumers determine the level of various nutrients in a standard serving of food in relation to their approximate requirement for it. The label actually provides the %DV so that you can see how much (what percentage) a serving of the product contributes to reaching the DV.

Data from U.S. Department of Health & Human Services, National Institutes of Health, Daily values.

Look at daily value in the main vitamin page.

Food sources for Vitamin D3

Look at food sources in the main vitamin page

External links

Wikipedia-Cholecalciferol MedlinePlus-Vitamin D