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Short Summary
Main recommendation: Choose magnesium glycinate, which Dr. Eric Berg says is the most absorbable form at up to 80%, and avoid magnesium oxide, which he says absorbs only about 4%. He also says magnesium is needed for vitamin D to work and that most people do not get enough from their diet.
Key Points
- Magnesium oxide is the most common over-the-counter form, but the video says it absorbs only about 4%, so most of the dose passes through the body and it produces little benefit.
- The speaker says magnesium oxide is also the form most often used in magnesium research, so he suggests those mixed study results may be misleading about magnesium in general.
- Other forms are ranked by the speaker's absorption estimates: magnesium sulfate about 10%, orotate up to 15%, taurate about 20%, lactate about 25%, citrate about 30%, malate about 40%, threonate about 75%, and glycinate up to 80%.
- Magnesium threonate is described as absorbing well and crossing the blood-brain barrier, so it is mainly for brain function and sleep rather than overall body benefits.
- Magnesium is described as involved in roughly 300 parts of biochemistry, supports energy production, helps vitamin D and vitamin K2 work, and affects blood pressure, muscle cramps, migraines, and sleep.
Details Worth Noting
- Concrete instructions:
- Avoid magnesium oxide; the speaker says you would need about 8,000 mg, or 20 capsules, to match a high-quality supplement, and taking that many would cause gastric stress and diarrhea.
- Choose magnesium glycinate for overall use, since the speaker describes it as gentle on the stomach and says it does not interfere with calcium or iron.
- Take magnesium at night as a maintenance dose, and the speaker suggests 400 mg per day as a therapeutic dose, with the option to double that.
- If taking large amounts of glycinate all at once creates too many pills, spread the doses throughout the day.
- For a topical option, magnesium lactate in oil can be rubbed into muscles before bed, though the speaker says it will not reach the bloodstream through the skin.
- The speaker says magnesium levels are lowest around 4 a.m. and highest in the evening, so early-morning insomnia or leg and foot cramps may signal a subclinical deficiency.
- Magnesium citrate is linked to kidney stone prevention because it can reduce oxalates binding to calcium, and it also comes as a liquid.
- Magnesium malate is described as helpful for chronic fatigue syndrome and fibromyalgia.
- The speaker says blood tests are not reliable for magnesium because about 99% is inside cells and only about 1% is in the blood.
Bottom Line
Based on the video's absorption rankings, magnesium glycinate is presented as the strongest all-around choice, while magnesium oxide is presented as the weakest and least worthwhile despite being the cheapest and most common option. The speaker's claims about absorption figures and health effects are his own and are not presented here as professional medical advice.
