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Em Da Đen
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Saturday 20 June 2026 15:48:01 GMT
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A patient once asked me who to trust — his primary care doctor who said his vitamin D of 30 was fine, or his longevity doctor who said it wasn't enough. His western doctor called the longevity approach
A patient once asked me who to trust — his primary care doctor who said his vitamin D of 30 was fine, or his longevity doctor who said it wasn't enough. His western doctor called the longevity approach "stupid." And that's what bothered me most. Not the disagreement — the dismissal. The best thing a doctor can do when they don't know something is get curious. So I did. Here's what the research actually says: • Below 20: deficient. This cutoff was built to prevent bone disease in children — not optimize your health. • 20–30: most guidelines now call this insufficient. • 30–50: where most primary care doctors land for sufficiency. • 40–60: where a panel of 48 international vitamin D scientists landed as the optimal target, updated as recently as 2024. • 60–80: observational signal for cancer and autoimmune protection. Not yet proven in large trials, but not shown to be harmful either. • Above 150: dangerous. Drives hypercalcemia. My personal target: 40–80. It covers the evidence-backed sweet spot and captures the potential upside for cancer and autoimmune protection — without going where the science hasn't followed yet. If your doctor saw a 30 and said you're fine — it's worth pushing a little further. Always talk to your doctor before changing any supplement routine. Your friend in medicine, Dr. Hadley 🩺 📚 Holick, NEJM 2007 · Pludowski et al., Nutrients 2024 · GrassrootsHealth Scientists' Call to D*action 2024 #VitaminD #DoctorTok #DrHadley #Longevity #EvidenceBased

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