Best RD-Reviewed Magnesium Supplements 2026
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A Guide to Magnesium Supplements: Types, Benefits, and How to Choose the Right One

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Updated on March 11, 2026
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Magnesium is a mineral involved in hundreds of biochemical reactions in the body. Adults need between 310 and 420 milligrams of magnesium a day, depending on age and lifestyle, but research suggests many don’t get enough.

“Magnesium is a mineral your body quietly depends on all day long,” says Diane Lindsay-Adler, RDN, CDN, assistant professor of pediatrics at New York Medical College. “It helps muscles relax after they contract, nerves send signals properly, the heart maintains a steady rhythm, and the brain regulates mood and sleep.”

When diet alone isn’t enough to meet needs, supplements can help fill the gap. But choosing one isn’t always straightforward, as magnesium doesn’t come in just one form. “The difference between magnesium supplements is in what compound the magnesium is chemically attached to, which impacts how it gets absorbed and used by your body,” explains Max Snider, RD, owner of Max Snider, RD in Sudbury, Ontario.

As a registered dietitian, I’ve seen firsthand how confusing the supplement aisle can feel. Labels highlight benefits, but rarely explain how magnesium forms differ or how to make an informed decision.

Some forms are better known for aiding digestion, while others are chosen for their ability to promote sleep or relaxation. This guide is designed to help you understand the different types of magnesium, what they do in the body, and why you might choose one over another.

To build this list, my dietitian colleagues and I reviewed ingredient quality, dosing transparency, third-party testing, and overall brand reputation. We also explain when certain magnesium forms may be useful and safety considerations to keep in mind.

When to Consult Your Doctor

Magnesium supplements are generally considered safe, but they aren’t appropriate for everyone. While dietary supplements are regulated by the U.S. Food and Drug Administration (FDA), they are not approved for safety, effectiveness, or labeling accuracy before being sold. Because quality can vary, choosing brands that undergo third-party testing for purity and potency is important.

If you’re unsure whether you need a supplement or if you have underlying health conditions or take medications, your doctor or a registered dietitian can help you make a safe choice.

Magnesium Citrate

Not all magnesium supplements behave the same way in the body. Magnesium must be bound to something else to be absorbed. “That binding partner influences how the magnesium is absorbed, where it is distributed, and what effects it’s most associated with,” explains Jenna Stangland, RD, Specialist in Sports Dietetics in Minneapolis, Minnesota.

Magnesium citrate is bound to citric acid and is one of the more bioavailable forms (meaning the body can use and absorb it).

 It’s often used to increase levels if someone is deficient, or for its digestive benefits. It works by drawing water into the intestines, which can improve stool frequency and consistency, making it best for constipation and sluggish gut motility, according to dietitian Jessica Corwin, MPH, RDN, owner of Eat Grow Live in Grand Rapids, Michigan.

Magnesium citrate can sometimes cause loose stools or gastrointestinal discomfort because it’s so effective. “This kind of magnesium has a laxative effect, so it’s not always the best option for sensitive stomachs,” notes Snider. For those who tolerate it well, however, it can be an affordable, accessible option.

magnesium

NOW Foods Magnesium Citrate Powder

Buy on Amazon $11.60

We like the simple formulation of Now Foods Magnesium Citrate with 450 milligrams of magnesium citrate in 1 teaspoon. Powdered options can be especially helpful for people who dislike swallowing pills or want more control over the amount they take.

This product stands out for its minimal ingredient list: only magnesium citrate, with no unnecessary fillers or additives. It’s also third-party tested, which means it’s been independently tested for purity and contaminants.

magnesium

Solgar Magnesium Citrate Tablets

Buy on Amazon $13.90

Lindsay-Adler likes Solgar Magnesium Citrate Tablets, an affordable option for those who prefer an easy-to-take capsule format. This product contains 400 milligrams in two tablets, with no fillers or artificial ingredients.

Solgar has a long-standing reputation for quality and uses extensive in-house quality control testing. The company reports that it analyzes all raw and finished materials using purity and quality standards set by United States Pharmacopeia (USP) guidelines.

magnesium

Trace Minerals Magnesium Liquid

Buy on Amazon $15.99

Trace Minerals Magnesium Liquid is a good option for people who prefer a liquid magnesium supplement over pills or powders. With 300 milligrams of magnesium (primarily as citrate) per serving, you can easily mix this into water or juice.

This liquid stands out for its straightforward ingredient list and third-party testing. Some people also prefer liquid for kids who need supplementation, since it can be easier to take.

Magnesium Glycinate

Magnesium glycinate (sometimes labeled as magnesium bisglycinate) is comprised of magnesium bound to glycine, an amino acid that plays a role in nervous system regulation.

 “Magnesium glycinate is digested very well and does not have a laxative effect,” explains Snider. “It’s very easy on the stomach, which is why it’s commonly recommended for sleep and for correcting magnesium deficiency.”

This combination of absorption and tolerability makes glycinate a frequent go-to among dietitians. “I use this one myself and recommend it for sleep, muscle relaxation, and anxiety,” says Corwin.

 “This form would be great for periods of high stress, travel, and back-to-back competitions where recovery is top priority,“ adds Stangland.
magnesium

Klean Athlete Magnesium Glycinate

Buy on Amazon $26.50

We like this magnesium glycinate capsule for people who want an athlete-friendly option that’s easy to add to a daily routine. Each capsule provides 120 milligrams of magnesium glycinate, and the product is NSF Certified for Sport, meaning it’s been third-party tested to verify that the contents match the label and that it’s free of substances banned in athletic competition.  
This formula is also non-GMO and vegan. Because magnesium plays a role in muscle function, relaxation, and recovery, this glycinate option can be a helpful addition for anyone who is active and needs a little more support.

magnesium

Pure Encapsulations Magnesium Glycinate

Buy on Amazon $27

Pure Encapsulations Magnesium Glycinate is a top choice if you’re looking for a quality, vegan-friendly magnesium glycinate. Each capsule contains 120 milligrams of magnesium in a form that’s generally well tolerated and associated with relaxation and overall magnesium repletion.

Pure Encapsulations is a brand that nearly all our experts recommended or said they use themselves. All raw materials and finished supplements are third-party tested for heavy metals and contaminants. The vegan capsules and simple formula make it a good fit for people who prioritize transparent ingredients.

magnesium

JSHealth Magnesium+ Powder

Buy at JS Health $39.99

JSHealth won us over with its tasty raspberry lemonade flavor. Everyday Health writer and registered dietitian SaVanna Shoemaker, MS, RDN, LD, tested an entire container and found it tastes great mixed in plain water or other beverages (like orange juice and sparkling water).

Each two-scoop serving contains 400 milligrams of magnesium from a combination of magnesium citrate, magnesium amino acid chelate, and magnesium glycinate dihydrate. The inclusion of three different forms of magnesium also makes this product an excellent all-around magnesium supplement for people who aren’t necessarily looking for a specific benefit. JSHealth’s products are also third-party tested, and this magnesium supplement is vegan and non-GMO.

magnesium

Thorne Magnesium Bisglycinate

Buy at Thorne $52

Thorne Magnesium Bisglycinate is a powder I personally use and enjoy because it mixes easily and tastes good. Each scoop provides 200 milligrams of magnesium, and Thorne is known for its high-quality, rigorously tested supplements, which gives me extra confidence in the product.

I love to make a drink with the powder as a pre-bedtime ritual. “Magnesium interacts with GABA receptors to calm nervous system activity and inhibits NMDA receptors to promote muscle relaxation,” explains Vancouver dietitian Jennifer Pallian, BSc, RD. “It also supports melatonin production and can lower cortisol levels, creating conditions that favor a more stable sleep–wake cycle.”

magnesium

Nature Made Magnesium Glycinate

Buy on Amazon $12.49

Nature Made Magnesium Glycinate is a budget-friendly option that provides 200 milligrams per two-capsule serving. If you want a straightforward option without a higher price tag, this pick fits the bill.

This product is USP verified, meaning the U.S. Pharmacopeia (an independent, nonprofit scientific organization) has tested it to confirm that it contains the ingredients listed on the label and meets quality standards for purity and potency. It’s also easy to find at many retailers.

Magnesium L-Threonate

Magnesium L-threonate is a form of magnesium often used to support brain health. It consists of magnesium bound to L-threonic acid, a compound derived from vitamin C.

 “Magnesium L-threonate was engineered to cross the blood-brain barrier more efficiently,” says Canadian dietitian Avery Zenker, MAN, RD. This means it may reach the brain more readily, where it could support processes involved in memory and focus.

Research in this area is still growing. “Magnesium L-threonate has emerging evidence suggesting it may cross the blood-brain barrier more effectively than other forms,” says Corwin. A few small studies have shown improvements in cognitive measures, especially for older adults, though Corwin notes that data remain limited. “It’s often used to support brain health and sometimes sleep,” adds Snider.

magnesium

Life Extension Neuro-Mag Magnesium L-Threonate

Buy at Life Extension $31.50
Life Extension Neuro-Mag is our pick for a brain-focused magnesium L-threonate supplement. It contains Magtein, a patented form of magnesium L-threonate that has been evaluated in research for its potential cognitive benefits.

 The formula is also non-GMO, gluten-free, vegetarian, and third-party tested for safety, purity, and quality.
A three-capsule serving provides 144 milligrams of elemental magnesium from 2,000 milligrams of magnesium L-threonate. Elemental magnesium refers to the total amount of usable magnesium in the product.

 This form delivers less elemental magnesium than options like citrate or glycinate, so it’s typically chosen for targeted neurological support rather than correcting a deficiency.

 Life Extension also offers a gummy version for those who prefer an alternative to capsules.
magnesium

Recess Mood Powder

Buy at Recess $14.99

Recess Mood Powder delivers its magnesium in convenient, portable stick packs and pairs it with other calming ingredients, like L-theanine and passionflower. L-theanine is an amino acid associated with relaxation and stress reduction, while passionflower is an herb used to support calmness and sleep.

Each stick pack provides around 210 milligrams of magnesium from 1,561 milligrams of Recess’s proprietary magnesium blend (containing magnesium L-threonate, magnesium glycinate, and magnesium citrate), so you get a combination of multiple types of magnesium. Recess products are also vegan and third-party tested.

magnesium

Sports Research Magnesium-L-Threonate

Buy on Amazon $29.95

Sports Research Magnesium L-Threonate is another Magtein-based magnesium supplement formulated for cognitive support. Each serving provides 2,000 milligrams of Magtein, delivering 144 mg of elemental magnesium.

Sports Research products are third-party tested, and the brand states that its supplements are manufactured in cGMP-controlled, certified facilities, which help support quality, purity, and consistency.

Other Types of Magnesium

There are several other magnesium forms you may encounter, though they aren’t used or recommended as often.

Magnesium oxide, for example, is one of the most affordable and widely available options, but many experts don’t recommend it for general supplementation. “Magnesium oxide has low bioavailability, meaning only a small amount is actually absorbed,” explains Zenker. Because it’s poorly absorbed, it draws water into the intestines, which can make it more useful for constipation (although most dietitians prefer magnesium citrate).

 Corwin adds that despite its high elemental magnesium content, oxide is much more likely to cause gastrointestinal side effects.
Magnesium malate and magnesium taurate are sometimes chosen for more targeted goals. Malate is bound to malic acid, a compound involved in cellular energy production. “Magnesium malate is connected to cellular energy production and muscle function, although evidence remains limited,” says Pallian.

Magnesium taurate pairs magnesium with taurine, an amino acid associated with cardiovascular function. Pallian adds that this form is linked to blood pressure and cardiovascular support.

magnesium

Nature Made Magnesium

Buy at Nature Made $6.19
Some people may still be interested in a magnesium oxide option due to affordability. While magnesium oxide is not as easy for the body to absorb as other forms of magnesium, studies show that it can still be useful for constipation.

Nature Made provides 400 milligrams of magnesium from magnesium oxide. It’s also gluten-free and contains no artificial flavors or preservatives. For a softgel that provides nearly 100 percent of your daily magnesium needs, the price point may work. Just keep in mind that this option is more likely to cause gastrointestinal symptoms.

magnesium

Source Naturals Magnesium Malate

Buy on Amazon $11.79

Source Naturals blends magnesium with malic acid to support energy and muscle function. It provides 425 milligrams of magnesium from magnesium malate trihydrate.

Van Adler recommends this option for its straightforward formulation and quality standards. Source Naturals products are third-party tested and free of common allergens, including yeast, dairy, egg, gluten, soy, and wheat. It also contains no artificial colors, flavors, or preservatives.

magnesium

Jarrow Formulas Magnesium Taurate

Buy on Amazon $32.49
Jarrow Formulas Magnesium Taurate provides 300 milligrams of magnesium taurate to support cardiovascular and nervous system function. Although magnesium taurate is less commonly recommended than forms like glycinate or citrate, it has gained attention for its potential heart health benefits.

Research on magnesium taurate is still emerging. Taurine itself has been studied for its role in supporting cardiovascular function.

 While additional research is needed, this product may appeal to people looking for magnesium with some additional heart health support.

What Are the Benefits of Magnesium?

“Magnesium is a vital mineral for human physiology because it participates in hundreds of biochemical reactions that keep cells functioning normally,” says Pallian. While magnesium supplements aren’t necessary for everyone, research suggests they may offer support for those who don’t get enough or need a higher therapeutic dose.

The list of magnesium benefits is long, but the following are some of the most common ways magnesium supports health:

  • Sleep and Relaxation: Magnesium plays a role in regulating the nervous system, which helps explain its connection to sleep. “Higher intakes of magnesium are linked to better sleep quality and duration,” says Zenker.

  • Muscle and Nerve Function: “Magnesium is also an essential electrolyte, helping support proper muscle and nerve function, making it important for active adults,” says Snider. Low magnesium levels may contribute to muscle cramps or weakness in some individuals.

  • Digestive Health: “Some types of magnesium, like oxide and citrate, are used like a laxative to stimulate bowel movements,” says Zenker. Magnesium citrate, in particular, is often chosen for occasional constipation because it draws water into the intestines and tends to be more gentle than magnesium oxide.

  • Mood: Magnesium may offer an additional tool to support anxiety and depression. “Clinical research shows supplementation can produce meaningful improvements in mild-to-moderate depression and anxiety symptoms, often within two weeks, and may enhance the effects of antidepressant medications,” says Pallian.

  • Bone Health: “Magnesium plays an important role in bone structure and bone building,” says Zenker. Some studies suggest supplementation may help support bone density, especially for postmenopausal women.

  • Blood Pressure: “Magnesium may also contribute to blood pressure regulation,” says Pallian. “Meta-analyses of randomized controlled trials show supplementation leads to small but statistically significant reductions in systolic and diastolic blood pressure.”

What Foods Are High in Magnesium?

Magnesium is found in a wide variety of foods, primarily plant-based options. “Magnesium is widely distributed across the food supply,” says Pallian. “Nuts, seeds, legumes, and whole grains consistently provide the greatest amounts, while fish, meats, and milk contribute moderate levels.” Some of the richest sources include pumpkin seeds, almonds, cashews, black beans, lentils, and whole grains like brown rice and whole-wheat bread.

Magnesium also appears in many everyday foods people may not immediately associate with the mineral. Pallian notes that peanut butter, bananas, avocados, yogurt, chocolate milk, cocoa-based products, and fortified breakfast cereals can all contribute to intake.

Although diet is the ideal source, magnesium intake gaps are common. “Dietary intake data suggest that a significant proportion of adults, especially women, do not meet recommended magnesium intakes, making suboptimal intake fairly common,” says Corwin.

Are Magnesium Supplements Safe for Everyone?

Magnesium supplements are generally considered safe for healthy adults when taken as directed, but they aren’t appropriate for everyone. Digestive side effects are the most common issue, particularly at higher doses. “High intakes of magnesium from supplements can cause digestive symptoms like diarrhea, abdominal pain, and bloating,” adds Zenker.

Certain health conditions, like kidney disease, and the use of medications, also warrant extra caution. “Magnesium can also interact with the absorption of certain meds, including some antibiotics and thyroid medications, so timing matters,” Corwin explains.

 Stangland also emphasizes that taking more than recommended may lead to symptoms such as low blood pressure or muscle weakness in sensitive individuals.

It’s also worth remembering that magnesium status isn’t always reflected in routine bloodwork. “About half of your magnesium is stored in bone, and most of the rest lives inside your cells — not floating in your bloodstream,” says Lindsay-Adler. “That’s why a normal blood magnesium level does not always mean your body has enough.”

What Form of Magnesium is Best?

There is no single “best” magnesium for everyone. “The choice depends on what you’re looking to address. The ‘best’ form is the one that aligns with your specific health needs,” says Stangland.

“For example, citrate is best supported for constipation, while glycinate is often preferred for general repletion, sleep, or stress support due to better tolerability,” says Corwin. “Claims that one form is universally superior are not supported by the evidence.” 

FAQ

Is it better to take magnesium citrate or magnesium glycinate?
It depends on your goal. Magnesium citrate is commonly used for constipation, while magnesium glycinate is generally preferred for sleep, relaxation, and overall magnesium repletion due to its good absorption and gentler effect on the stomach.

Daily magnesium supplementation may be appropriate if your dietary intake is low and the dose is appropriate. However, since high amounts may cause digestive side effects or interact with medications or health conditions, it’s a good idea to speak to your healthcare provider before starting.


Possible signs of low magnesium may include muscle cramps, twitching, fatigue, weakness, or restless legs, but these symptoms are not specific to magnesium deficiency. Because magnesium status isn’t always easy to assess solely from symptoms, it’s best to check with your healthcare provider if you’re concerned about your levels or considering supplementation.


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Resources
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  3. Pardo MR, et al. Bioavailability of magnesium food supplements: A systematic review. Nutrition. September 1, 2021.
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  14. Liguori S, et al. Role of Magnesium in Skeletal Muscle Health and Neuromuscular Diseases: A Scoping Review. International Journal of Molecular Sciences. October 18, 2024.
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  16. Groenendijk I, et al. Impact of magnesium on bone health in older adults: A systematic review and meta-analysis. Bone. January 1, 2022.
  17. Argeros Z, et al. Magnesium Supplementation and Blood Pressure: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Hypertension. November 2025.
  18. Attinger MC, et al. Single Center, Open‐Label, Randomized Crossover Trial on Drug–Drug Interactions of Levothyroxine/Magnesium‐Citrate and Levothyroxine/Magnesium‐Aspartate in Healthy Subjects—The ThyroMag Trial. Clinical and Translational Science. November 2025.
  19. Ajib FA et al. Magnesium Toxicity. . StatPearls. January 2025.
  20. Magnesium: Fact Sheet for Health Professionals. .  National Institutes of Health.