Information about vitamin D can be found at reputable health websites such as the National Institutes of Health and WebMD, according to the NIH and WebMD. Such sites can provide alternate names for vitamin D, side effects, uses and interactions.
The NIH has an entire department devoted to dietary supplements, notes the NIH. The website also offers FDA safety and warning information, a frequently asked question section and information about what consumers need to know about dietary supplements. Users can also find references to all information used to compile website fact sheets.
WebMD offers treatment reviews for individuals taking vitamin D for a variety of health conditions, says WebMD. Such health conditions include treating rickets, high blood pressure, high cholesterol, diabetes and rheumatoid arthritis. The site also offers information for individuals who should use caution while taking vitamin D, individuals such as pregnant women and those who have kidney disease, high calcium in the blood, lymphoma and histoplasmosis.
The NIH website provides information on sources of vitamin D and individuals who are at risk of vitamin D deficiency, according to NIH. Fact sheets on dietary supplements include tables, bullet lists and links. Individuals can also learn how to spot health fraud, access daily reference intake tools and study daily value tables.