Magnesium Bisglycinate for Sleep: What Does the Research Say?

What Is Magnesium Bisglycinate?

Magnesium bisglycinate is a chelated form of magnesium in which magnesium is bound to the amino acid glycine.

The term "chelated magnesium" refers to a form in which a mineral is bound to another compound, such as an amino acid.

There are several forms of magnesium used in dietary supplements, and they differ in their chemical structures and characteristics. Magnesium bisglycinate is one form that has attracted interest in research relating to sleep.

It is important, however, not to assume that all forms of magnesium have the same effects.

What Does Magnesium Do in the Body?

According to the National Institutes of Health (NIH) Office of Dietary Supplements, magnesium is a cofactor in more than 300 enzyme systems involved in a wide range of biochemical reactions.

These include processes related to:

• Normal nerve function

• Normal muscle function

• Protein synthesis

• Energy production

• Blood glucose regulation

• Blood pressure regulation

• The movement of calcium and potassium across cell membranes

  
  

Magnesium can be obtained naturally from foods such as nuts, seeds, legumes, whole grains and green leafy vegetables. It is also available in dietary supplements in different forms.

Why Is Magnesium Being Studied for Sleep?

Sleep is influenced by many factors, including lifestyle, stress, sleep habits, environment and overall health.

Magnesium contributes to normal nerve and muscle function, which are important physiological processes. Because of magnesium's role in the body, researchers have investigated whether magnesium supplementation may have a relationship with sleep quality.

More recently, researchers have specifically investigated magnesium bisglycinate and sleep, providing new evidence about its potential role in supporting sleep.

However, magnesium should not be considered a sleeping pill, and current evidence does not establish magnesium bisglycinate as a treatment or cure for insomnia.

What Does Research Say About Magnesium Bisglycinate and Sleep?

A 2025 randomized, double-blind, placebo-controlled clinical trial specifically investigated magnesium bisglycinate supplementation in healthy adults reporting poor sleep.

The study included 155 adults aged 18–65 years. Participants were randomly assigned to receive either magnesium bisglycinate providing 250 mg of elemental magnesium per day or a placebo.

The study lasted four weeks, and sleep symptoms were assessed using the Insomnia Severity Index (ISI) along with additional psychological questionnaires.

After four weeks, the magnesium bisglycinate group experienced a greater reduction in Insomnia Severity Index scores compared with the placebo group.

The researchers therefore concluded that magnesium bisglycinate produced a modest improvement in insomnia severity among adults reporting poor sleep quality. They also highlighted the need for further research, including longer studies and studies using objective measurements of sleep.

Is Magnesium Bisglycinate Good for Sleep?

Based on current research, magnesium bisglycinate shows potential as a nutritional option for people looking to support healthy sleep.

The 2025 randomized, placebo-controlled trial found a modest improvement in insomnia severity after four weeks among healthy adults who reported poor sleep quality. However, the study had a relatively short duration and the effect size was small.

More research is needed before stronger conclusions can be made.

For this reason, magnesium bisglycinate is best considered as part of a broader approach to healthy sleep rather than as a standalone solution.

How Much Magnesium Do We Get From Food?

Magnesium is naturally present in many foods.

Good dietary sources include:

• Nuts and seeds

• Legumes

• Whole grains

• Green leafy vegetables

• Some fortified foods

  
  

A balanced diet can provide magnesium along with other essential nutrients needed for normal body functions.

For individuals considering magnesium supplementation, the form and amount of magnesium should be considered as part of their overall nutritional needs.

Magnesium Bisglycinate as Part of a Balanced Lifestyle

Sleep quality is influenced by many different factors.

Nutrition is one part of the bigger picture, alongside healthy sleep habits, physical activity, stress management and an appropriate bedtime routine.

For people interested in magnesium bisglycinate for sleep, this form of magnesium may be one nutritional option to consider as part of a balanced wellness routine.

It should not replace healthy lifestyle practices or professional medical advice when sleep problems persist.

Frequently Asked Questions About Magnesium Bisglycinate

What is magnesium bisglycinate?

Magnesium bisglycinate is a chelated form of magnesium in which magnesium is bound to the amino acid glycine.

What is chelated magnesium?

Chelated magnesium refers to magnesium that has been chemically bound to another compound, such as an amino acid. Magnesium bisglycinate is one example of a chelated form of magnesium.

Is magnesium bisglycinate the same as magnesium?

No. Magnesium is the mineral itself, while magnesium bisglycinate is one specific form of magnesium used in dietary supplements.

Does magnesium bisglycinate help with sleep?

A 2025 randomized, placebo-controlled trial found that magnesium bisglycinate produced a modest improvement in insomnia severity among healthy adults reporting poor sleep quality after four weeks of supplementation

Is magnesium bisglycinate a treatment for insomnia?

No. Current evidence does not establish magnesium bisglycinate as a treatment or cure for insomnia.

The 2025 clinical trial found a modest improvement in insomnia severity, but the researchers recommended further research.

What are the benefits of magnesium?

Magnesium is involved in more than 300 enzyme systems and contributes to important physiological functions, including normal nerve and muscle function and energy production.

Why is magnesium bisglycinate used in supplements?

Magnesium bisglycinate is one form of chelated magnesium used in dietary supplements. Its specific structure makes it distinct from other forms of magnesium.

References

1. National Institutes of Health, Office of Dietary Supplements. Magnesium – Health Professional Fact Sheet. Updated January 6, 2026.

2. Schuster J, Cycelskij I, Lopresti A, Hahn A. Magnesium Bisglycinate Supplementation in Healthy Adults Reporting Poor Sleep: A Randomized, Placebo-Controlled Trial. Nature and Science of Sleep. 2025;17:2027–2040. doi:10.2147/NSS.S524348.