Dr Ford Brewer - PrevMed DON'T Make THIS Vitamin D3 Mistake - Ford Brewer MD MPH
Apr 2, 2026
Discussion of vitamin D3 as a hormone-like nutrient affecting calcium and immune function. Explanations of why sunlight often does not prevent deficiency. Warnings about high-dose D3 claims and the risks of accumulation and hypercalcemia. Emphasis on the common mistake of supplementing without testing and clear target blood levels to aim for.
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Vitamin D3 Is A Hormone Affecting Heart Health
- Vitamin D3 acts like a hormone affecting immunity, inflammation, and calcium absorption, not just bone health.
- Low D3 raises vascular inflammation, impairs T-cells and macrophages, and increases arterial plaque risk leading to heart attacks and strokes.
Sunlight Alone Often Fails To Keep D3 Adequate
- Sunlight makes vitamin D but aging, sunscreen, indoor life, dark skin, and living far north reduce skin production.
- Many people remain deficient despite apparent sun exposure differences within households.
Golfing Husband Had Lower D3 Than Indoor Wife
- Dr. Ford Brewer shares a contrasting household example where a golf-playing husband had low D3 while his mostly-indoor wife did not.
- This illustrates unpredictability of sun exposure, behavior, and individual D3 status.