evidence: Vitamin K shots are safe and polysorbate 80 isn’t poisonous, contrary to claim by Brandy Vaughan [...] A recurring claim fueling that hesitancy is that vitamin K injections contain dangerous ingredients. An example is the allegation by the late anti-vaccine activist Brandy Vaughan that vitamin K injections contain a molecule called polysorbate 80 as "main active ingredient" that has "strong links with infertility, with autoimmune issues". She also added that polysorbate 80 was "banned in a lot of countries". [...] Polysorbate 80 is also an ingredient in some vitamin K injections. However, contrary to what Vaughan claimed, polysorbate 80 isn’t the "main active ingredient" of vitamin K injections. An active ingredient is the molecule that exerts a direct therapeutic or medical effect. In the case of vitamin K injections, the active ingredient is the vitamin K itself. Polysorbate 80 is actually an excipient.