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Magnesium Glycinate Supplements:
10 Popular Options on Amazon, Compared by Label

Last reviewed: October 2026

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What Happens When Your Body is Low on Magnesium?

Many people struggle with restless nights and constant stress without realizing the root cause might be magnesium depletion.
According to MedlinePlus (part of the U.S. National Institutes of Health), a magnesium deficiency (hypomagnesemia) can directly impact your body in several ways:
1. Chronic fatigue and weakness: Feeling completely drained, even after resting.
2. Muscle cramps and spasms: Frequent muscle aches, twitching, or numbness.
3. Nervous tension & loss of appetite: Nausea, not feeling hungry, and mood fluctuations.
4. Cardiovascular issues: In severe cases, it can lead to an irregular heartbeat (arrhythmia).
(View the full NIH medical documentation here: https://medlineplus.gov/lab-tests/magnesium-blood-test/)

How this list was made

These are ten widely sold magnesium glycinate (bisglycinate) products available on Amazon in the U.S. I chose them to show a range of forms, amounts per serving, and testing claims. Prices, ratings, and rankings change often, so this page does not list them. Click through to Amazon to see the current ones.
As an Amazon Associate I earn from qualifying purchases.
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1. Pure Encapsulations Magnesium (Glycinate)

• Manufactured in NSF-certified, cGMP-compliant facilities, Pure Encapsulations ensures the highest level of purity without unnecessary additives.
• Quality Standards (cGMP, transparent testing protocols): https://www.pureencapsulationspro.com/quality
• Healthline Quality Review: https://www.healthline.com/nutrition/pure-encapsulations-review
• Form: Capsule
• Magnesium per serving: 120 mg (as magnesium glycinate) in 1 capsule
• Formula notes: Short ingredient list: vegetarian capsule (cellulose, water) and ascorbyl palmitate
• Testing: No named third-party certification on the Amazon listing
• Pros: Short, clearly listed ingredients. One-capsule serving.
• Cons: 120 mg per capsule, so a higher amount means more capsules. No named certification shown on the listing.

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2. Thorne Magnesium Glycinate

• Backed by prestigious NSF and TGA certifications, Thorne is the trusted choice of elite athletes and healthcare professionals globally.
• Official Certifications (NSF, TGA, cGMP, medical partnerships): https://www.thorne.com/quality
• Healthline Rating & Review: https://www.healthline.com/nutrition/thorne-supplements-review
• Form: Capsule
• Magnesium per serving: 120 mg (as magnesium glycinate) in 1 capsule
• Formula notes: Hypromellose capsule, medium chain triglyceride oil, silicon dioxide
• Testing: NSF Contents Certified, meaning contents were verified against the label and checked for contaminants
• Pros: Named third-party certification. One-capsule serving.
• Cons: 120 mg per capsule. This capsule product is not listed as NSF Certified for Sport.

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3. NatureBell Pure Magnesium Glycinate 500 mg

• Form: Capsule
• Magnesium per serving: The listing states 500 mg magnesium glycinate, described as 90 mg elemental magnesium
• Formula notes: Listing names magnesium glycinate and vitamin C
• Testing: Listed as "3rd Party Tested." The testing organization is not named.
• Pros: Large 240-capsule bottle. Listing states the elemental amount.
• Cons: Serving details are not fully shown in the listing text, so check the Supplement Facts image. Testing organization is not named.

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4. Double Wood Magnesium Glycinate 400 mg

• Form: Capsule
• Magnesium per serving: 60 mg elemental magnesium per capsule (from 400 mg magnesium bisglycinate)
• Formula notes: 180 capsules per bottle
• Testing: NSF Contents Certified. The brand also publishes a Certificate of Analysis for a tested lot.
• Pros: Named certification and published lab results. Brand states the elemental amount.
• Cons: The name says "400 mg," but the magnesium is 60 mg per capsule, so it is the lowest per-capsule amount in this list.

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5. Doctor's Best High Absorption Magnesium (Glycinate Lysinate)

• Form: Tablet
• Magnesium per serving: 200 mg in 2 tablets (Albion magnesium lysinate glycinate chelate)
• Formula notes: Vegan, non-GMO, gluten-free, soy-free. Includes microcrystalline cellulose and croscarmellose.
• Testing: No named third-party certification shown on the listing
• Pros: Vegan formula. Higher amount per serving.
• Cons: Tablets, not capsules. It is a glycinate plus lysinate blend, not glycinate alone. No named certification shown.

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6. Nutricost Magnesium Glycinate
210 mg

• Form: Capsule
• Magnesium per serving: 210 mg of magnesium (from magnesium bisglycinate) in 3 capsules
• Formula notes: Hypromellose capsule, dicalcium phosphate, magnesium stearate, silica
• Testing: Made in an NSF-certified GMP facility and tested by an independent lab, according to the brand. The facility certification is not a certification of the product itself.
• Pros: Higher amount per serving. Brand describes independent lab testing.
• Cons: 3 capsules per serving. Product-level certification is not named.

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7. Nobi Nutrition Magnesium Glycinate 500 mg

• Form: Capsule
• Magnesium per serving: 90 mg elemental magnesium from 500 mg magnesium glycinate chelate, in 2 capsules
• Formula notes: Vegan, gluten-free, non-GMO
• Testing: Listed as "Third-Party Tested" and made in a GMP-certified facility. The testing organization is not named.
• Pros: Vegan formula. Listing states the elemental amount.
• Cons: 2 capsules for 90 mg of magnesium. Testing organization is not named.

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8. Nature Made Magnesium Glycinate 200 mg

• Carrying the prestigious USP Verified mark, this industry staple has been a #1 Pharmacist Recommended choice for decades, ensuring absolute potency and purity."
• USP Verified Standards Publication: https://www.naturemade.com/pages/what-is-united-states-pharmacopeia
• Quality Commitment Information: https://www.naturemade.com/pages/nature-made-quality
• Pharmacy Times #1 Pharmacist Recommended Survey Report: https://www.businesswire.com/news/home/20240702505465/en/Nature-Made-Ranked-as-1-Pharmacist-Recommended-Vitamin-and-Supplement-Brand-in-Pharmacy-Times-Annual-Survey
• Official Award Data: https://www.naturemade.com/pages/pharmacy-times-survey-results
• Form: Capsule
• Magnesium per serving: 200 mg (as magnesium bisglycinate) in 2 capsules
• Formula notes: Hypromellose, magnesium stearate, cellulose gel, silicon dioxide. Gluten free.
• Testing: USP verification claimed on the brand's website
• Pros: USP verification mark from a well-known U.S. brand. Higher amount per serving than the 120 mg products.
• Cons: 2 capsules per serving, so the 60-capsule bottle is 30 servings.

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9. Nature's Bounty High Absorption Magnesium Glycinate 240 mg

• Form: Capsule
• Magnesium per serving: 240 mg (as magnesium glycinate) in 2 capsules
• Formula notes: Vegetable cellulose and ascorbyl palmitate. Non-GMO, suitable for vegetarians.
• Testing: Brand says it tests regularly, but no named third-party certification is shown
• Pros: Higher amount per serving. Short other-ingredients list.
• Cons: 2 capsules per serving. No named certification shown.

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10. Solaray Enhanced Absorption Magnesium Glycinate 350 mg

• Form: Capsule (VegCap)
• Magnesium per serving: 350 mg (from magnesium bisglycinate) in 4 capsules, with 5 mg BioPerine (black pepper extract)
• Formula notes: Vegetable cellulose capsule, magnesium stearate, cellulose, silica
• Testing: Made in an NSF-certified facility. Brand says it participates in "TESTED by SuppCo" independent testing.
• Pros: Highest amount per serving in this list. Brand describes independent lab verification.
• Cons: 4 capsules per serving. Contains black pepper extract, so ask a pharmacist if you take medication.

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