The Other Side of Vitamin D Supplementation with Morley Robbins

18 Apr 2024 · 38 min
Episode

18 Apr 2024 · 38 min

0:00

Podcast conversation (Holistic Dentistry Podcast) between Dr. Sanda Moldovan and Morley Robbins about unintended harms of routine vitamin D supplementation. Robbins argues low serum 25(OH)D often reflects inflammation (not causation), and that supplementing D can suppress immune cytokines, raise hepcidin, sequester iron in tissues, worsen magnesium loss, and block retinol-mediated copper bioavailability. He advocates addressing chronic inflammation by restoring bioavailable copper, retinol (vitamin A), magnesium and ancestral dietary fats (cod liver oil, beef liver, grass-fed butter/cream) rather than defaulting to high-dose vitamin D. He cites historical and peer-reviewed research (e.g., Ferris 1962 on renal potassium wasting, Muhammed Amer ~2014 on no benefit >21 ng/mL, Meg Mangan 2013 on vitamin D and inflammation) and gives practical markers/doses (magnesium dosing; historical copper intake estimates).

Questions this episode answers

5 milligrams per pound body weight (or 10 milligrams per kilogram).

Ancestors: ~4–6 mg/day (1930s); 1960s: ~2–5 mg/day; modern era: ~0.9 mg/day (about 9/10 of 1 mg).

Ferris (1962) on renal potassium wasting; Meg Mangan (2013) on vitamin D and inflammation; Muhammad Amer (~2014) finding no clinical benefit above 21 ng/mL; Fred Kummerow (pig studies, 1970s) on D causing heart disease.

About 60–80 nanograms per milliliter (as noted by functional medicine practitioners).

No clinical benefit above 21 ng/mL (per Muhammad Amer study cited ~2014).

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