Magnesium bisglycinate: The gentle, highly absorbable form for sleep, mood and muscle support

There are many magnesium types and it can be hard to choose, but knowing the function each tends to have in the body is a good start.

Magnesium bisglycinate, in particular, is popular for the important role it has in improving sleep quality and relaxation. It also supports bone health, digestion and memory.

What is magnesium bisglycinate?

Magnesium glycinate, magnesium bisglycinate or magnesium diglycinate, are forms of magnesium made by combining the mineral with the amino acid glycine. These forms are said to be gentler on the stomach with less chance of it causing loose bowel movements or digestive upset.

Because of its gentle and efficient delivery, it has become one of the most selected forms for those wanting to replenish magnesium levels comfortably, if you have a sensitive stomach, for example.

It is often used to support restful sleep, muscle recovery and cardiovascular health (1). It also plays an important part in building collagen and elastin for healthy tissues, supports bile acid function for digestion, and acts as a calming neurotransmitter in the brain and nervous system.

The importance of glycine for absorption

Glycine (as the component in magnesium glycinate) is the smallest amino acid in the body, small enough to move easily through cell membranes.

It is for this reason that magnesium glycinate is great for absorption and assimilation into the body (2).

Magnesium bisglycinate is similar to magnesium glycinate but includes two glycine molecules, potentially offering even better absorption and effectiveness.

Sleep and relaxation

The glycine component adds a soothing effect of its own, helping to reduce core body temperature and ease the transition into sleep. Magnesium also helps regulate melatonin and cortisol (3), the two hormones that influence the body’s sleep/wake rhythm, contributing to more stable rest patterns.

Magnesium bisglycinate may play an important role in improving sleep quality and relaxation. It supports the calming neurotransmitter gamma-aminobutyric acid (GABA), which helps quieten the nervous system and prepare the body for rest (4).

Anxiety and mood

This form of magnesium may help support emotional steadiness and reduce feelings of tension. By influencing neurotransmitters such as serotonin and dopamine, magnesium bisglycinate can help maintain balanced brain chemistry that underpins mood regulation.

It also appears to moderate the release of cortisol, the body’s main stress hormone, which in turn may ease the physical and mental strain associated with chronic stress. Magnesium’s role in regulating NMDA receptors also helps prevent overactivation in the brain, contributing to cognitive balance and emotional calm (5).

Musculoskeletal health

Did you know - around 60% of the body’s magnesium is stored in the bones, while the rest is found within soft tissues, with only about 1% present in the blood? (6)

In terms of muscle - magnesium bisglycinate supports normal muscle contraction and relaxation, making it useful for those who experience cramps, spasms or post-exercise stiffness.

It works in partnership with calcium to maintain muscle rhythm, preventing the twitching or tightening sensations that can occur when magnesium levels are low (7).

Cardiovascular health

Adequate magnesium is essential for healthy heart rhythm and vascular tone. Magnesium acts as a natural calcium regulator within the heart muscle, ensuring proper contraction and relaxation of cardiac cells.

Maintaining optimal magnesium levels may therefore support steady heart function and balanced blood pressure. Low magnesium intake has been linked to a higher likelihood of irregular heartbeats (8).

Bisglycinate compared with other magnesium forms: What’s the difference?

As mentioned previously, compared with other magnesium supplements, bisglycinate is known for combining high bioavailability with gentle digestion.

Magnesium oxide has poor absorption and is mainly used as a laxative, while magnesium citrate is moderately absorbed but can still cause loose stools (9).

Intake guidance

Typical daily intake ranges from 200 to 400 milligrams of elemental magnesium (10).

Many people find that taking magnesium bisglycinate around 60 minutes before bed supports better rest and relaxation. Although this form is gentle on the digestive system, very high doses can still cause mild symptoms such as nausea or diarrhoea in some.

Safety

When taken at recommended amounts, magnesium bisglycinate is generally well tolerated. However, taking too much may cause digestive upset or interfere with other minerals.

People with impaired kidney function should exercise caution, as magnesium is cleared through the kidneys and may accumulate if not properly excreted.

Precautions

Anyone taking prescription medications, particularly antibiotics, diuretics, blood pressure or heart medicines, should consult a healthcare professional before using magnesium bisglycinate. Magnesium bisglycinate is usually considered safe for pregnant and breastfeeding women.

Takeaways

Magnesium bisglycinate is a gentle, highly bioavailable form of magnesium that may support sleep, mood, muscle recovery and heart health. Its superior absorption and mild digestive profile make it an appealing choice for maintaining healthy magnesium levels and promoting overall wellbeing.

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