Vitamin D3 (also called Cholecalciferol) is a fat-soluble vitamin that the body needs to absorb calcium and phosphate, which are important for healthy bones, teeth and muscles. Vitamin D is produced by the body when skin is exposed to sunlight, but it can be taken up from some foods such as oily fish, red meat, liver, and egg yolks, or as dietary supplement.
- NIH: National Institutes of Health, Office of Dietary Supplements. Vitamin D. https://ods.od.nih.gov/factsheets/VitaminD-HealthProfessional/ (accessed 7. August 2020)
- NHS UK. Vitamin D. https://www.nhs.uk/conditions/vitamins-and-minerals/vitamin-d/ (accessed 7. August 2020)
- WebMD. Vitamin D3. https://www.webmd.com/drugs/2/drug-10175/vitamin-d3-oral/details (accessed 7. August 2020)