Magnesium: More than 2 in 3 people are deficient. Here are the best forms to supplement with and those to avoid.

Why Magnesium Matters

Magnesium plays a role in over 300 biochemical reactions in the body. It supports:

• Muscle and nerve function
• Energy production
• Blood sugar regulation
• Bone health
• Heart rhythm
• Stress response and sleep quality

Low magnesium levels may contribute to fatigue, muscle cramps, headaches, poor sleep, anxiety, and difficulty concentrating.

Why Deficiency Is So Common

Modern diets often lack magnesium-rich foods like leafy greens, nuts, seeds, and whole grains. On top of that, stress, alcohol consumption, certain medications, and digestive issues can all reduce magnesium absorption.

Even people who eat “healthy” may still fall short.

The Best Forms of Magnesium to Supplement With

1. Magnesium Glycinate

Best for: Sleep, stress, muscle relaxation
This form is bound to glycine, an amino acid that promotes calmness. It’s highly absorbable and gentle on the stomach.

✔ Excellent absorption
✔ Minimal laxative effect

2. Magnesium Citrate

Best for: Constipation and general supplementation
Magnesium citrate is well absorbed but has a mild laxative effect, making it useful for digestive support.

✔ Good absorption
✖ May cause loose stools in higher doses

3. Magnesium Malate

Best for: Energy and muscle support
Bound to malic acid, this form may help with muscle soreness and fatigue.

✔ Supports energy production
✔ Gentle for most people

4. Magnesium L-Threonate

Best for: Brain health and cognitive support
This newer form is known for its ability to cross the blood-brain barrier.

✔ May support memory and focus
✖ More expensive

Forms of Magnesium to Avoid or Use With Caution

Magnesium Oxide

This is one of the most common and least expensive forms — but also one of the least effective.

✖ Poor absorption
✖ Primarily acts as a laxative

Magnesium Sulfate

Also known as Epsom salt, this form is not intended for regular oral supplementation.

✖ Best used externally (baths), not internally

How Much Magnesium Do You Need?

General daily recommendations:

• Men: 400–420 mg
• Women: 310–320 mg

Many supplements provide 100–200 mg per serving, allowing flexibility based on individual needs.