Magnesium is available in many different forms, including magnesium oxide, citrate, chloride and glycinate. The form matters because it affects how magnesium is absorbed and how the body tolerates it.
Magnesium glycinate is created by binding magnesium to the amino acid glycine, forming a compound often referred to as magnesium bisglycinate when it is fully chelated.
This chelation process helps the magnesium pass through the digestive system more efficiently, improving absorption and reducing the likelihood of digestive upset compared with some other forms of magnesium.¹
Because of these characteristics, magnesium glycinate is commonly used for long-term supplementation where gentle digestion and consistent absorption are important.
The Role of Glycine
One of the unique aspects of magnesium glycinate is the presence of glycine, an amino acid that plays several roles in the body.
Glycine functions as an inhibitory neurotransmitter, meaning it helps calm nerve signalling in the central nervous system.²
It is also involved in:
-
Nervous system regulation
-
Sleep physiology
-
Collagen formation
-
Detoxification processes in the liver
When magnesium is bound to glycine, the compound may offer complementary support for nervous system balance.
Absorption and Bioavailability
Magnesium glycinate is often considered one of the more bioavailable forms of magnesium, meaning the body can absorb and utilize it effectively.
Some magnesium forms, such as magnesium oxide, contain a high percentage of elemental magnesium but are less efficiently absorbed by the body.³
Chelated forms like magnesium glycinate are designed to improve intestinal absorption while remaining gentle on digestion.
This makes magnesium glycinate a common choice for people who:
-
Experience digestive sensitivity
-
Want consistent magnesium support
-
Are using magnesium for nervous system or sleep support
True Magnesium Glycinate vs Buffered Forms
Not all magnesium glycinate products are the same.
Some supplements labeled as “magnesium glycinate” are actually buffered blends, where a small amount of magnesium glycinate is combined with cheaper magnesium salts such as magnesium oxide.
While these products may still contain glycinate, the majority of the magnesium may come from the other forms.
True magnesium glycinate — often labeled magnesium bisglycinate — contains magnesium fully bound to two glycine molecules.
This distinction matters because chelation influences how the compound behaves during digestion and absorption.
Why Magnesium Glycinate Is Often Used for Nervous System Support
Because of its absorption characteristics and the presence of glycine, magnesium glycinate is frequently chosen when the goal is to support:
-
Nervous system balance
-
Muscle relaxation
-
Sleep quality
-
Stress regulation
Magnesium itself helps regulate neurotransmitters and ion channels involved in nerve signalling, while glycine contributes inhibitory signalling within the nervous system.⁴
Together, these properties make magnesium glycinate a commonly used form for supporting relaxation and neurological balance.
References
-
Gröber U et al. Magnesium in Prevention and Therapy. Nutrients. 2015.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4586582/ -
Bannai M et al. Glycine ingestion improves subjective sleep quality. Sleep and Biological Rhythms. 2012.
https://pubmed.ncbi.nlm.nih.gov/22573530/ -
Walker AF et al. Magnesium absorption from different magnesium salts. Magnesium Research. 2003.
https://pubmed.ncbi.nlm.nih.gov/14596323/ -
Vink R, Nechifor M. Magnesium in the Central Nervous System. University of Adelaide Press. 2011.
https://www.ncbi.nlm.nih.gov/books/NBK507265/
0 comments