14 Warning Signs of Low Magnesium Levels and What to Do About It (Science Based)

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Magnesium is one of the most important minerals in the human body.
It supports over 300 biochemical reactions, including muscle function, nerve signaling, energy production, and heart rhythm.

Yet, studies show that up to 70% of people don’t get enough magnesium — leading to symptoms that many ignore or mistake for other health issues.

Here are 14 science-based warning signs that your magnesium levels may be too low, plus what to do about it.

1. Muscle Cramps and Spasms

Magnesium helps muscles relax.
Low levels cause involuntary contractions, leg cramps, or twitching—especially at night.

2. Fatigue and Low Energy

Magnesium is required for ATP (the body’s energy molecule).
A deficiency can make you feel tired, weak, or drained even after rest.

3. Anxiety and Stress Sensitivity

Research shows magnesium helps regulate the nervous system and cortisol.
Low levels can increase anxiety, irritability, and emotional sensitivity.

4. Trouble Sleeping (Insomnia)

Magnesium helps produce melatonin and promotes relaxation.
Low intake can cause difficulty falling asleep or staying asleep.

5. Headaches and Migraines