evidence: A Facebook reel posted in May 2024 referred to vitamin D3 supplements as "rat poison", calling them "radiated sheep’s wool mixed with chloroform". It also asserted that vitamin D levels are only low due to lack of sunlight and "high vitamin A diets" and that only vitamin D3 from the sun is safe. The reel was viewed more than 403,000 times at the time of writing. [...] Vitamin D3 supplements aren’t "radiated sheep’s wool mixed with chloroform" [...] Torrens’ description of vitamin D3 supplements as "radiated sheep’s wool and chloroform" is inaccurate. The process of artificially synthesizing vitamin D3 parallels the process that occurs in the human body upon exposure to sunlight. Specifically, it involves UV irradiation of 7-dehydrocholesterol derived from lanolin—a waxy substance extracted from sheep wool. Lanolin is also used in creams to treat skin irritation due to breastfeeding. Neither sheep wool nor chloroform are ingredients in artificial vitamin D3.