You train twice a day and you make weight for the weigh-in. Every session costs you sweat, and with that sweat you lose minerals. Magnesium bisglycinate is the form that athletes are most frequently recommended today. What exactly does magnesium bisglycinate do for your recovery, your energy, and your performance? We compared four scientific publications, from a Cochrane review to a review article from July 2026.
Table of contents
- What is magnesium bisglycinate?
- Why magnesium counts for combat athletes
- Magnesium bisglycinate benefits: what the research shows
- Where the evidence ends
- Which magnesium is the best? The forms compared
- Pure magnesium bisglycinate: why without oxide
- Dosage, timing and safety
- Related topics
- Frequently asked questions
- Conclusion
What is magnesium bisglycinate?
Short answer: a chelated form of magnesium, where one magnesium ion is bound to two glycine molecules. Organic forms like glycinate are better tolerated and better absorbed than inorganic salts like oxide. Magnesium bisglycinate contains approximately 14% elemental magnesium: 1,450 mg of the compound provides about 200 mg of magnesium.
In studies and on labels you will also read magnesium glycinate. In practice, both names refer to the same compound.
Magnesium in a supplement is never alone. It is always bound to a partner, and that partner determines how much your intestines absorb and how your stomach reacts. A complete comparison of all forms can be found in our article on which form of magnesium is the best.
Why magnesium counts for combat athletes
Magnesium is a cofactor in more than 300 enzymatic reactions. These include the production of ATP, the fuel for every muscle cell, and the protein synthesis you need to recover. The mineral also regulates the transport of calcium and potassium across your cell membranes. In this way, it controls the functioning of your nerves and muscles (Sankararaman et al., 2026).
Where magnesium is in your body
An adult body contains about 25 grams of magnesium.
- More than half is stored in your bones.
- About a third is in your muscles.
- Only 1% circulates in your blood serum.
A normal blood value says little
Because so little magnesium is in your blood, the serum value only drops in the event of a severe deficiency. A normal result therefore does not rule out a deficiency. Experts therefore combine serum, urine, and food intake to estimate magnesium status.
A subclinical deficiency is more common than an acute deficiency. In the United States, more than half of adults do not get as much magnesium as is recommended. The first signs are vague: fatigue and lethargy, later muscle cramps and tremors.
Magnesium bisglycinate benefits: what the research shows
Recovery and muscle soreness
In a small double-blind study, participants were given 350 mg of magnesium glycinate or a placebo. The magnesium group reported less muscle soreness, a lower perceived exertion, and a better feeling of recovery. The outcomes were measured subjectively, so caution is warranted. For a fighter with four sparring sessions per week, it remains a relevant signal (Sankararaman et al., 2026).
Energy and nervous system
Magnesium contributes to normal energy-yielding metabolism, normal muscle function, and normal functioning of the nervous system. It also contributes to the reduction of tiredness and fatigue. These are EU-approved health claims based on the role of magnesium in the energy production of every cell. They apply to every easily absorbable form, including magnesium bisglycinate.
Magnesium and vitamin D
Vitamin D from the sun or from a supplement must first be activated in your liver and your kidneys. All enzymes that convert vitamin D appear to need magnesium as a cofactor (Uwitonze & Razzaque, 2018). Anyone who supplements vitamin D without enough magnesium may get less out of it. Also read why almost every fighter has too little vitamin D.
Where the evidence ends
Magnesium bisglycinate is also heavily marketed. For the following two claims, there is not yet sufficient evidence.
More strength on top of good status
A meta-analysis of randomized studies found no effect of magnesium supplementation on muscle strength and muscle power in most athletes with a relatively good magnesium status. People with a deficiency, such as the elderly and chronic alcohol users, may benefit from it (Wang et al., 2017). Magnesium therefore works as a supplement in the event of a deficiency.
Preventing muscle cramps
A Cochrane review concluded that magnesium likely does not offer clinically meaningful protection against idiopathic muscle cramps in the elderly. For cramps during exercise, there are no randomized studies yet (Garrison et al., 2020). The claim that magnesium prevents sports cramps is therefore unproven.
Which magnesium is the best? The forms compared
The answer depends on your goal. For daily supplementation, absorption and tolerability count the most.
| Form | Type | Absorption and tolerability | Typical use |
|---|---|---|---|
| Magnesium oxide | Inorganic salt | Lower, laxative at high dose | Chronic constipation |
| Magnesium citrate | Organic | Higher than oxide, laxative at high dose | Quick effect on the bowel |
| Magnesium bisglycinate | Organic chelate | High, few gastrointestinal complaints | Daily long-term supplementation |
| Magnesium L-threonate | Organic | Higher than oxide | Marketed for the brain |
| Magnesium malate | Organic | Higher than oxide | Marketed for energy and muscles |
For athletes who supplement every day, magnesium bisglycinate remains the defensible choice. In clinical practice, glycinate is often chosen because it is better tolerated and causes fewer gastrointestinal complaints.
Pure magnesium bisglycinate: why without oxide
Some formulas mix bisglycinate with oxide. This cheaply increases the elemental number on the label, while absorption lags behind. Therefore, always check the full composition.
SHIDO Foundation, per daily dose (3 capsules):
- 1,450 mg magnesium bisglycinate: provides 200 mg of elemental magnesium, without added oxide.
- Within the upper limit: 200 mg remains well below the 350 mg that serves as the upper limit for magnesium from supplements in adults.
Together with eight other ingredients, SHIDO Foundation forms a daily base for athletes. The full composition can be found on our ingredients page.
Dosage, timing and safety
- Recommended intake: 400 to 420 mg of magnesium per day for adult men, from food and supplements combined.
- Upper limit from supplements: 350 mg of elemental magnesium per day for adults.
- Most reported side effect: diarrhea and gastrointestinal complaints, especially at high doses.
- Kidney problems: consult your doctor first. Your kidneys excrete magnesium, so with reduced kidney function, the risk of an excessively high magnesium level increases.
Food remains your primary source. Green leafy vegetables, whole grains, nuts, and seeds are rich in magnesium. Your intestines absorb about 30 to 40% of the magnesium from food, and fibers, phytates, and oxalates inhibit that absorption.
There is no strong evidence for the best time to take magnesium bisglycinate. Choose a fixed time with a meal so that your daily intake remains consistent.
Related topics: magnesium glycinate, magnesium benefits and more
Anyone searching for magnesium glycinate arrives at the same compound as magnesium bisglycinate. The broader magnesium benefits, such as normal muscle function and the reduction of fatigue, apply to every form your body absorbs well. The question of which magnesium is the best therefore depends on your goal. Pure magnesium bisglycinate is the choice for daily use without oxide. A magnesium deficiency in athletes often goes unnoticed, because a blood test only deviates in the event of a severe deficiency. Magnesium and vitamin D work together, because your body needs magnesium to activate vitamin D. Calculate with the elemental magnesium on every label, because that number determines your actual dose. Those who prioritize recovery after training will find in bisglycinate a well-tolerated base.
Frequently asked questions about magnesium bisglycinate
Is magnesium bisglycinate the same as magnesium glycinate?
In practice, yes. Both names refer to magnesium bound to the amino acid glycine. Manufacturers use the terms interchangeably.
How much magnesium bisglycinate should I take per day?
Calculate using the elemental magnesium on the label. A daily dose of 1,450 mg of magnesium bisglycinate provides approximately 200 mg of elemental magnesium.
Can I take magnesium and vitamin D together?
Yes. The enzymes that activate vitamin D need magnesium as a cofactor. A good magnesium status therefore helps your body utilize vitamin D.
Does magnesium bisglycinate have side effects?
It is generally well tolerated. At high doses, diarrhea and gastrointestinal complaints may occur. If you have reduced kidney function, consult your doctor first.
Conclusion
Magnesium bisglycinate supplements a deficiency with a form that your intestines absorb well and tolerate well. Research supports a role in energy and muscle function, with an initial signal for recovery. Evidence is lacking for extra strength on top of a good status and for the prevention of sports cramps.
PURE BISGLYCINATE. No added oxide.
200 MG ELEMENTAL. Well within the upper limit.
Do you want to know what else is in your daily base? See the full composition of SHIDO Foundation and start with a formula built for fighters.
This article is informative in nature and does not replace medical advice. Consult your doctor or pharmacist before you start supplementation, especially when using medications.
