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Magnesium glycinate mixed with Magnesium oxide


Magnesium is one of the most used natural health products for good reason, it does so many beneficial things. It relaxes tight muscles, calms nerves, widens blood vessels and reduces inflammation just to name a few. From a physiological perspective, it is one of the key lynch pins of your cellular energy production so it is no surprise it has so many applications. To learn more about why magnesium is such a common deficiency click here.

Regarding magnesium products and the increasing amount of elemental magnesium. Below is a summary of the different forms of magnesium and the % of magnesium in each form.

Magnesium Form

% Mg

Description and Summary

Key Clinical Uses

Mg oxide


Commonly used in OTC laxatives


Mg citrate


Commonly used form – good absorption but still can be laxative

Laxative, general magnesium support

Mg (bis)glycinate


Amino acid glycine has calming effect on nerves

Insomnia, restless legs, anxiety, muscle spasm

Mg malate


Malate increases energy production inside cell

Fibromyalgia, muscle pain

Mg aspartate


Aspartate helps transport fats inside the cell

Chronic fatigue

Mg taurate


Normalizes electrical activity across membranes in heart and brain

Cardiovascular diseaseArrhythmia

Mg orotate


Orotic acid also increases the formation of RNA and DNA, which can help repair damage to heart cells, improve stress tolerance and therefore improve function

HypertensionCongestive Heart Failure Mitral valve prolapse Stable angina Blood vessel elasticity

Mg theronate


Studied to penetrate past the blood brain barrier

Brain injuries, cognition, memory, focus


One of the most popular forms is magnesium glycinate. We obviously want higher amounts of elemental magnesium but this immediately raised some red flags because dosage calculations just don`t add up. As you can see in the above chart, the percent of elemental magnesium for magnesium glycinate is 11-14%, this means the maximum elemental magnesium would be 100-120mg.


You are probably asking how is it possible to get 150 or 200mg of magnesium glycinate per cap? The label clearly states magnesium glycinate as the only medicinal ingredient. The only plausible answer is it`s NOT pure magnesium glycinate. What else is it then? The likely culprit is magnesium oxide, with a much higher percentage (58%) of elemental magnesium, could be combined with magnesium glycinate to inflate the total elemental magnesium content on the label. While adding magnesium oxide to magnesium glycinate is not going to harm a person, it may increase the likelihood of having loose stools without increasing magnesium levels effectively. 

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