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October 7, 2026

Magnesium: the mineral behind 300 body functions you may be missing

Magnesium is involved in more than 300 enzymatic reactions in the human body, from energy production to heart rhythm and bone density. Yet deficiency has become increasingly common, driven largely by modern diets heavy in processed foods. Understanding what this mineral does — and how to get enough of it — matters for virtually every system in the body.

Magnesium-rich foods including leafy greens, nuts and seeds
Illustration © etreheureux.net

In brief

  • —Magnesium fuels over 300 biochemical reactions
  • —Deficiency can cause cramps, fatigue, insomnia and more
  • —Chia seeds, leafy greens and whole grains are top sources

Over 300 reactions: why magnesium is essential to every cell

Magnesium is both a mineral and an electrolyte, and it functions as a biochemical catalyst in more than 300 enzymatic reactions throughout the body. That figure alone signals how deeply embedded this nutrient is in basic physiology.

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