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Short Summary
Main recommendation: Choose an organic, well-absorbed form of magnesium such as magnesium citrate, magnesium carbonate, magnesium glycinate, or magnesium bisglycinate rather than inorganic magnesium oxide, especially if diet and water are unlikely to supply enough. The video frames this as a response to widespread magnesium shortfall, with 50 to 85% of Americans reportedly not meeting the recommended daily amount.
Key Points
- Declining magnesium in crops is attributed to chemical fertilizers (NPK: nitrogen, phosphorus, potassium) replacing manure, so the nutrient is not returned to the soil.
- Refining foods strips magnesium: estimated losses are about 82% for wheat flour, 83% for polished rice, and about 97% for corn starch.
- Softened municipal water removes calcium and magnesium, which the video estimates accounts for about 10% of the recommended daily allowance.
- Alcohol, soft drinks (phosphoric acid), gastrointestinal diseases (inflammatory bowel disease, Crohn's, ulcerative colitis, celiac disease), and diuretics can lower magnesium levels.
- Dr. Fung notes the earlier correlation studies are association studies only, and cites a 2016 randomized controlled trial that found improved arterial stiffness (pulse wave velocity) after 24 weeks of supplementation, with the study's author suggesting this could translate into up to a 7% reduction in cardiovascular disease if extrapolated.
Details Worth Noting
- Concrete instructions: Prefer organic magnesium salts such as magnesium citrate, magnesium carbonate, magnesium glycinate, or magnesium bisglycinate; read labels and avoid products listing inorganic magnesium oxide, which the video says is poorly absorbed and mostly passes through the stool.
- Concrete instructions: Include magnesium-rich foods such as dark chocolate, nuts, legumes, tofu, and seafood.
- Concrete instructions: For a transdermal option, Epsom salts (magnesium salts) in a bath soaked for about half an hour were given as an example, though absorption is not well quantified.
- Dr. Fung notes that magnesium hydroxide, a form that is poorly absorbed, is used in laxatives like Milk of Magnesia because it pulls water into the bowel.
- Most body magnesium is stored in bone (about 60%) and muscle (about 20%), so blood tests may not reliably reflect deficiency.
- The video states the speaker has no sponsorship and sells no supplements. Dosage amounts were not specified in the transcript; this is general information, not professional medical advice.
Bottom Line
Magnesium shortfalls are common because of farming, refining, water softening, and lifestyle factors, and the form you choose matters, since organic salts are reported to be absorbed far better than magnesium oxide. Discuss supplementation with a healthcare professional, especially if you have heart, blood pressure, or digestive conditions.
