Can Magnesium Bisglycinate Support a Better Mood?

It is well known that magnesium can offer support for occasional sore muscles and sleep quality... But a growing body of research suggests it may also support mood and help with occasional feelings of stress and anxiety. 

In this article, you’ll learn what the studies show about magnesium for mood support, about different forms of magnesium, and how magnesium supports sleep.

Emerging research suggests magnesium may support how the body responds to stress and sleep challenges in everyday life. In a randomized, placebo-controlled trial, magnesium supplementation was associated with improvements in perceived stress and sleep quality in healthy adults (1). 

Additional research using magnesium bisglycinate specifically has found modest improvements in sleep quality in adults with poor sleep, compared to placebo (2).

Because sleep and stress are so closely tied to how we feel day-to-day, these effects may help explain why magnesium is often associated with supporting overall mood and emotional balance. 

Magnesium regulates NMDA receptors in the brain (3) - the receptors responsible for excitatory signaling. When magnesium levels are low, these receptors can become overactive — a state researchers have associated with increased stress response and low mood (4,5).  

Magnesium helps regulate cortisol - the body's primary stress hormone. Research shows that low magnesium is associated with elevated cortisol levels, and that higher cortisol in turn accelerates magnesium loss through urine (6,7). The more stressed you are, the faster your magnesium depletes - and the lower your magnesium, the harder it becomes for your body to bring cortisol back down. On top of that, magnesium is needed to produce serotonin - the brain's "feel-good" chemical (7).  

You might like this article, too: Dr. Green Life Supplement Guide For Mood Support

When you're under chronic stress, your body burns through magnesium faster - and in turn, low magnesium makes it harder to regulate your stress response (7) ... like a self-reinforcing loop. 

To learn more about managing occasional stress, read this article: Should You Be Taking Adaptogens? Benefits for Stress, Focus, and Balance

Processed diets, chronic stress, alcohol, and certain medications can all deplete magnesium levels (8). Heavy exercise drains it further through sweat. It is estimated that 45% of Americans are deficient in magnesium (9). The potential symptoms - irritability, low mood, poor sleep, brain fog - are easy to write off as just feeling run down, but if those symptoms sound familiar, it's worth checking in with your doctor. 

Some forms of magnesium - like magnesium oxide - have an absorption rate of less than 4% (10). Magnesium bisglycinate is a form of magnesium that is bonded to glycine, an amino acid, which allows it to be absorbed through a much more efficient pathway in the gut (2). It's also far gentler on the stomach. 

Glycine itself adds further benefit. It's an inhibitory neurotransmitter that helps calm an overactive nervous system and supports GABA - the brain's primary calming signal (2).  

Preclinical research also suggests bisglycinate may be especially good at raising magnesium levels in the brain specifically, compared to other forms (2). 

To learn more about the different forms of magnesium read this article: Magnesium 101: Benefits, Food Sources, Daily Needs, and Supplement Types

Poor sleep and low mood are closely linked - each tends to make the other worse. Magnesium helps relax the nervous system (10), supporting the process of falling and staying asleep. Better sleep then feeds directly back into a better mood the next day. 

Taking magnesium bisglycinate in the evening - around 30 to 60 minutes before bed - is the approach most people find works best. The calming properties of both magnesium and glycine work together to support a proper wind-down. 

To learn more about supporting sleep, read this article: The Optimal Bedroom Temperature for Every Age (And Other Gentle Ways to Support Restful Sleep)

The research is clear: magnesium plays a meaningful role in how we feel. It regulates stress hormones, supports serotonin production, and helps keep the brain's excitatory signals balanced - and most people aren't getting enough of it. Magnesium bisglycinate is amongst the most bioavailable and best-tolerated forms available, making it a strong choice for those looking to support their mood, manage everyday stress, and sleep better. As with any supplement, speak to your doctor before starting a new regimen.

1. Briskey D, Erickson J, Smith C, Rao A. Wild Nutrition’s Food-Grown® Magnesium Supplementation Increases Sleep Quality and Sleep Duration and Reduces Stress in a Healthy Adult Population: A Double-Blind, Randomised, Placebo-Controlled Study. 2024. Food and Nutrition Sciences, 15, 509-523. doi: 10.4236/fns.2024.157034.

2. Schuster J, Cycelskij I, Lopresti A, Hahn A. Magnesium Bisglycinate Supplementation in Healthy Adults Reporting Poor Sleep: A Randomized, Placebo-Controlled Trial. Nat Sci Sleep. 2025 Aug 30;17:2027-2040. doi: 10.2147/NSS.S524348. PMID: 40918053; PMCID: PMC12412596.

3. Papadopol V, Nechifor M. Magnesium in neuroses and neuroticism. In: Vink R, Nechifor M, editors. Magnesium in the Central Nervous System [Internet]. Adelaide (AU): University of Adelaide Press; 2011. Available from: https://www.ncbi.nlm.nih.gov/books/NBK507254/

4. Kirkland AE, Sarlo GL, Holton KF. The Role of Magnesium in Neurological Disorders. Nutrients. 2018 Jun 6;10(6):730. doi: 10.3390/nu10060730. PMID: 29882776; PMCID: PMC6024559.

5. Serefko A, Szopa A, Poleszak E. Magnesium and depression. Magnes Res. 2016. PMID: 27910808.

6. Sartori SB et al. Magnesium deficiency induces anxiety and HPA axis dysregulation. Neuropharmacology. 2012. PMID: 21835188.

7. Pickering G, Mazur A, Trousselard M, Bienkowski P, Yaltsewa N, Amessou M, Noah L, Pouteau E. Magnesium Status and Stress: The Vicious Circle Concept Revisited. Nutrients. 2020 Nov 28;12(12):3672. doi: 10.3390/nu12123672. PMID: 33260549; PMCID: PMC7761127.

8. Kothari M, Wanjari A, Shaikh SM, Tantia P, Waghmare BV, Parepalli A, Hamdulay KF, Nelakuditi M. A Comprehensive Review on Understanding Magnesium Disorders: Pathophysiology, Clinical Manifestations, and Management Strategies. Cureus. 2024 Sep 1;16(9):e68385. doi: 10.7759/cureus.68385. PMID: 39355467; PMCID: PMC11444808.

9. Workinger JL, Doyle RP, Bortz J. Challenges in the Diagnosis of Magnesium Status. Nutrients. 2018 Sep 1;10(9):1202. doi: 10.3390/nu10091202. PMID: 30200431; PMCID: PMC6163803.

10. Mori H, Tack J, Suzuki H. Magnesium Oxide in Constipation. Nutrients. 2021 Jan 28;13(2):421. doi: 10.3390/nu13020421. PMID: 33525523; PMCID: PMC7911806.