Mayo Clinic also explains that vitamin D toxicity is usually caused by taking large doses of vitamin D supplements, not by normal food intake or sunlight.
This means the danger usually comes from supplement misuse. For example, someone may take a high-dose vitamin D pill every day without realizing it is meant to be taken weekly or only for a short period. Another person may take several products at the same time, such as a multivitamin, a bone health supplement, and a separate vitamin D capsule, and accidentally combine too
