Magnesium has become an increasingly popular supplement, but shopping for one can get confusing quickly. You’ll see glycinate, citrate, oxide, L-threonate, malate, taurate and more—so what’s actually different?

Magnesium itself is an essential mineral involved in hundreds of processes throughout the body, including muscle and nerve function, energy production and bone health³. Different forms have different characteristics, particularly when it comes to absorption and digestive tolerance. This guide breaks down the common forms so you can understand the differences and make an informed choice.

What Are the Different Types of Magnesium?

Magnesium in supplements generally isn’t found on its own; instead, it’s combined or bonded with another substance⁵. That’s where names like citrate, glycinate and oxide come from. The compound can influence factors such as absorption and digestive tolerance, which means there isn’t one form that’s automatically right for everyone.

Magnesium Glycinate/Bisglycinate

Magnesium glycinate, also known as magnesium bisglycinate, is a chelated form created by binding magnesium to the amino acid glycine. While you may see both “glycinate” and “bisglycinate” used on supplement labels, the terms are commonly used to refer to the same form of magnesium.

Glycinate is known for its good absorption and is generally considered gentle on the digestive system¹. Compared with some other forms of magnesium, it is less likely to produce a laxative effect, which may make it a suitable option for those with sensitive stomachs or regular bowel movements⁵. It is also commonly found in supplements focused on relaxation, muscle support and evening routines⁴.

Magnesium Citrate

Magnesium citrate is a common form of magnesium made by combining magnesium with citric acid¹. It is generally well absorbed by the digestive tract, making it a popular choice for magnesium supplementation.

One of the biggest differences between citrate and glycinate is its effect on digestion. Magnesium citrate can have a laxative effect and may cause loose stools in some people^4,5. While this may be an unwanted effect for some, it is also one reason citrate is commonly used by those looking to support bowel regularity. Magnesium citrate is also frequently found in products designed to support muscle function³ and general magnesium intake.

Magnesium Chloride

Magnesium chloride is a form of magnesium combined with chloride. It is highly soluble and is commonly found in a range of magnesium formulations.

Like other forms of magnesium, magnesium chloride provides a source of the essential mineral and contributes to functions throughout the body, including normal muscle and nerve function and bone health. Its high water solubility is one of the characteristics that distinguishes it from other forms of magnesium.

Magnesium Oxide

Magnesium oxide is formed by combining magnesium with oxygen¹. It is an affordable and widely available form of magnesium that is commonly found in dietary supplements, antacids and laxative products⁵.

Compared with forms such as citrate and glycinate, magnesium oxide is generally less efficiently absorbed by the body and can have a more noticeable laxative effect^4,2. For this reason, it is commonly found in products designed to support bowel regularity as well as provide supplemental magnesium. When comparing magnesium oxide with other forms, both digestive tolerance and the amount of elemental magnesium provided are worth considering.

Magnesium L-Threonate/Magtein

Magnesium L-Threonate differs from more common forms of magnesium such as citrate and oxide. Its distinguishing characteristic is the growing research around its ability to cross the blood-brain barrier and increase magnesium concentrations in the brain⁴. As a result, L-Threonate is commonly found in supplements focused on areas such as memory and overall brain health.

What Is Magtein®?

You may also come across Magtein®, a trademarked form of magnesium L-Threonate. Rather than being a completely different type of magnesium, Magtein® is a specific branded form of the compound. Magnesium L-Threonate is a newer and more specialised form of magnesium, and research into its specific cognitive benefits is still developing¹².

Magnesium Malate

Magnesium malate combines magnesium with malic acid, a naturally occurring compound found in foods such as apples. Malic acid plays a role in the body’s cellular energy production, which is one reason this form is commonly found in supplements focused on energy and muscle function⁴.

Magnesium malate offers another option for those looking to increase their magnesium intake and is commonly found in formulas focused on energy and muscle function. It offers another option alongside more commonly recognised forms such as glycinate and citrate.

Magnesium Taurate

Magnesium taurate combines magnesium with taurine, an amino acid-like compound found naturally throughout the body. This form is commonly associated with cardiovascular-focused supplements due to the roles magnesium and taurine play within the body, including processes related to normal heart and nervous system function⁴.

Taurate is generally considered a well-tolerated form and is less commonly associated with the laxative effects of forms such as magnesium citrate and oxide. However, research specifically examining magnesium taurate is still relatively limited, and further evidence is needed to better understand the potential benefits of this form.

Magnesium Complex/Mag-8

Magnesium complex combines two or more forms of magnesium within a single formula¹¹. Since different forms of magnesium can vary in characteristics such as absorption and digestive tolerance, multi-form formulas offer an alternative to choosing a supplement containing just one magnesium source.

You may also come across products such as Mag-8, which combine several forms of magnesium within one formula. This can be appealing for those looking for a broader approach to magnesium supplementation and the convenience of multiple forms in a single product. However, more forms don’t necessarily mean a supplement is better or more effective. It’s still important to consider the types of magnesium provided and how the overall formula fits your individual needs.

What Should You Look for When Choosing Magnesium?

1. Consider the Form

Different forms of magnesium have different characteristics because the mineral is bound to another compound, such as an amino acid or organic acid. This can influence factors such as absorption and digestive tolerance, making the form of magnesium an important consideration when comparing supplements^6,7.

2. Check the Elemental Magnesium

Another thing to look for is elemental magnesium. The amount listed for an entire magnesium compound isn’t necessarily the amount of magnesium itself. Magnesium is bound to another compound, such as glycine, citrate or oxygen, so the total compound includes both the magnesium and the substance it’s paired with¹⁰.

Elemental magnesium refers specifically to the amount of magnesium provided by that compound. When comparing products, check the Supplement Facts panel to understand how much elemental magnesium is provided per serving rather than relying solely on the total weight of the magnesium compound¹⁰.

3. Consider Your Individual Needs

Finally, consider why you’re choosing a magnesium supplement. Different forms may suit different needs, whether you’re looking for a generally well-tolerated option, considering digestive effects or exploring more specialised forms such as Magnesium L-Threonate. It’s also worth considering the serving size, product directions and how well you personally tolerate the formula⁸.

There isn’t one form of magnesium that’s automatically right for everyone. If you’re unsure which form is appropriate for you, particularly if you take medications or manage an existing health condition, speak with a healthcare professional before starting a new supplement⁹.

Which Type of Magnesium Is Right for You?

When it comes to choosing magnesium, there isn’t one form that’s automatically better than the rest. Each type has its own characteristics, from differences in absorption and digestive tolerance to how it may fit into your individual wellness needs.

Ultimately, the right magnesium comes down to what you’re looking for, how your body responds and the formulation that works best for your routine. Understanding the differences between each form can make navigating the supplement aisle a little easier and help you make a more informed choice.

Explore the range of magnesium supplements at MYDFX to find an option that fits your routine.

Magnesium Explained: Which Type Is Right for You?