Gideon M‑K: Health Nerd (Substack)

There's No Such Thing As A Vitamin D Deficiency - Part 4

The 2024 Endocrine Society guidelines discard the notion of a vitamin D deficiency and limit supplementation to four specific groups: pregnant people, adults over 75, children under 18, and individuals with prediabetes. The series argues that robust evidence shows vitamin D pills offer little to no health benefit for most of these categories, especially pregnant women, seniors, and children. The only remaining recommendation is for people with prediabetes, a group the author scrutinizes in the final installment. The article underscores the mismatch between a multibillion‑dollar supplement market and weak scientific support.