Thorne Magnesium Bisglycinate

1. Ingredients 25% of the rating 4 of 5

   Three lines: magnesium bisglycinate, citric acid and monk fruit; no flow agents, capsule or artificial sweetener, but the sweetener and acid are added.

2. Independent testing 35% of the rating 3 of 5

   NSF lists two pack sizes (21 and 12 lots), but Thorne publishes no batch results and we found no independent test.

3. Evidence 15% of the rating 3 of 5

   The glycinate form and 200 mg dose fit our guide, but its sleep evidence is one small trial and the page promises more.

4. Trust 10% of the rating 3 of 5

   Thorne settled a 2014 lead case for $250,000 and has two unresolved 2025 lead notices on other products; one buyer says a 2026 batch felt different.

5. Value 15% of the rating 3 of 5

   $52 for 60 scoops is $0.87 for 200 mg, about half again the price of Momentous’s capsule.

The rating, 3.3 of 5, is the weighted average of these scores. See how we rank vitamins & minerals and our standard.

• Vitacost (opens in a new tab) approx. $52.00. The 7.98 oz (226.2 g) jar (UPC 693749006442), the size on Thorne’s current label. In stock on 2026-10-23.
• Amazon (opens in a new tab) approx. $44.20 with Subscribe & Save. The 60-serving jar (the $5.54 per ounce shown works out to 7.98 oz), sold by Pattern, a third-party seller (we could not confirm whether Thorne authorizes it), and shipped by Amazon. The one-time price did not show to our tools, so the price here is the Subscribe & Save one (15 percent off) on 2026-10-23. Amazon has other listings for this powder that show 6.5 oz.

Prices as we saw them on October 23, 2026. They change often. These links carry no tracking code and earn us nothing.

1. Magnesium (as magnesium bisglycinate) 200 mg
2. Citric acid
3. Monk fruit concentrate

• Paid certification NSF Certified for Sport

  Lists “Thorne Magnesium Bisglycinate”: powder, unflavored, 226.2 g, one scoop 3.77 g, 21 lots; a second listing (187 g pack, 3.11 g scoop, 12 lots) does not match the current label. Thorne pays for the program. NSF says it verifies label contents, heavy metals and microbes, and 290 banned substances. It publishes no results. Open ↗ (opens in a new tab)

Does Thorne pay influencers and athletes to promote it?

Yes. Thorne’s own ambassador page (opens in a new tab) says ambassadors earn a commission on every new customer who uses their link and receive free products. Its partners page (opens in a new tab) names athletes, a fitness coach and organizations such as the UFC, and states no terms. So a post saying “I use Thorne” may be paid.

Has Thorne had lead or recall problems?

Yes, in the past. Environmental Research Center v. Thorne Research settled in November 2014 for $250,000 over lead in dietary supplements, with warnings or reformulation and testing required (notice 2013-01044 (opens in a new tab)). A second 2014 notice named 13 Thorne products, none of them this one (2014-01211 (opens in a new tab)). In 2025 two new notices named Daily Greens Plus and Daily Electrolytes, with no settlement or judgment recorded (2025-02343 (opens in a new tab), 2025-03196 (opens in a new tab)). FDA records show two Class II recalls in 2014 of Captomer, a product sold as a supplement that FDA treated as an unapproved drug, closed in October 2014. We found no FDA warning letter.

Is the monk fruit sweetener a problem?

It is a plant extract, not one of the artificial sweeteners we exclude (sucralose, acesulfame potassium, aspartame, saccharin, neotame, advantame, cyclamate). A user on r/fasting (opens in a new tab) says Thorne told them the powder has no calories or carbohydrates, and asks whether a sweetener could still break a fast; we found no research that settles it. If you want no sweetener at all, choose a capsule.

Has a recent batch changed?

One buyer wrote on r/Supplements (opens in a new tab) in June 2026 that a new bottle felt different, with more evening activation. It is a single report and we cannot test it: NSF’s listing shows 21 lot numbers but no results, so batches cannot be compared.

Which NSF listing matches the pack I am buying?

NSF lists three Thorne magnesium bisglycinate items: a 226.2 g jar with a 3.77 g scoop (opens in a new tab), which matches Thorne’s current label, a 187 g jar with a 3.11 g scoop (opens in a new tab), and a 30-stick pack of 3.8 g sticks (opens in a new tab). Check the scoop or stick size on your pack: Target’s listing, for one, is titled 6.5 oz, which is the older 187 g size.

• NSF lists the product in its Certified for Sport database: powder, unflavored, 226.2 g, one scoop is 3.77 g (the scoop size on Thorne’s current label), with 21 lots shown. A second listing covers a 187 g pack with a 3.11 g scoop and 12 lots, which does not match that label. Thorne explains the mark as testing for compliance with the label and for nearly 300 banned substances.
• Magnesium bisglycinate is the glycinate form. Our guide to the types of magnesium describes it as well absorbed and the gentlest on the stomach.
• The label is short: 200 mg of magnesium per scoop, with citric acid and monk fruit concentrate as the only other ingredients. There is no magnesium stearate, no capsule and no artificial sweetener.
• 200 mg a scoop is under the 350 mg a day upper limit for supplemental magnesium.

• It is sweetened. Monk fruit is a plant extract, not one of the artificial sweeteners we exclude, but it is still an added sweetener in a product that does not need one.
• It costs more than basic forms: about $52 for 60 servings, roughly $0.87 a serving, for 200 mg of magnesium. Momentous’s capsule costs about $0.57.
• One scoop is more than half of the 350 mg a day upper limit that applies to supplemental magnesium (see our types-of-magnesium guide). Count magnesium from other supplements, and ask a clinician before taking magnesium if you have kidney disease or take medicines that interact with it.
• Thorne’s page shows no certificate of analysis for a batch, and does not say where the powder is made. We found no independent test.

Third-party tested

Yes

Tested by

NSF (Certified for Sport)

Certificate of analysis

No

1. Thorne Magnesium Bisglycinate product page. Maker’s page. Price ($52 for 60 scoops), label and testing statements as seen 2026-10-23. Open ↗ (opens in a new tab)
2. Vitacost: Thorne Magnesium Bisglycinate, 7.98 oz (226.2 g). Independent source. A store listing (UPC 693749006442) that lists citric acid and monk fruit concentrate as the other ingredients and NSF Certified for Sport. $52.00 and in stock on 2026-10-23. Open ↗ (opens in a new tab)
3. Amazon: THORNE Magnesium Bisglycinate, powdered magnesium formula, 60 servings. Independent source. A store listing: ships from Amazon, sold by Pattern. The Subscribe & Save price was $44.20 (15 percent off), $5.54 per ounce, on 2026-10-23. Open ↗ (opens in a new tab)
4. Target: Thorne Magnesium Bisglycinate, 6.5 oz, 60 servings. Independent source. A store listing titled 6.5 oz, the older 187 g size, at $52.00 on 2026-10-23. Not the 7.98 oz jar on this page, so we do not list it under where to buy. Open ↗ (opens in a new tab)
5. NSF Certified for Sport listing: Thorne Magnesium Bisglycinate (powder, 226.2 g). Certifier or regulator listing. One scoop is 3.77 g, 21 lots shown, as on Thorne’s current label. Open ↗ (opens in a new tab)
6. NSF Certified for Sport listing: Thorne Magnesium Bisglycinate (powder, 187 g). Certifier or regulator listing. Still listed on 2026-10-23: one scoop is 3.11 g, 12 lots shown. Check the pack you are buying. Open ↗ (opens in a new tab)
7. NSF Certified for Sport listing: Thorne Magnesium Bisglycinate (30 sticks, 3.8 g). Certifier or regulator listing. A stick-pack version, unflavored, eight lots shown. Not the jar on this page. Open ↗ (opens in a new tab)
8. NSF Certified for Sport: what the mark means. Certifier or regulator listing. NSF’s description of what it verifies: 290 banned substances, label contents, no unsafe contaminants, GMP audits. Open ↗ (opens in a new tab)
9. Thorne Magnesium Glycinate (capsules) product page. Maker’s page. Label and price of the unsweetened capsule alternative, as seen 2026-10-23. Open ↗ (opens in a new tab)
10. Thorne Ambassadors. Maker’s page. Says ambassadors earn commission on referrals and receive free products. Open ↗ (opens in a new tab)
11. Thorne Partners. Maker’s page. Lists athletes, a fitness coach and organizations including the UFC; no terms stated. Open ↗ (opens in a new tab)
12. California Attorney General Prop 65 notice 2013-01044 (Thorne Research). Certifier or regulator listing. Lead in dietary supplements. Complaint filed 2014-03-17; settlement 2014-11-20, $250,000 in total payments; judgment 2015-01-28. Open ↗ (opens in a new tab)
13. California Attorney General Prop 65 notice 2014-01211 (Thorne Research). Certifier or regulator listing. Lead or cadmium in 13 named Thorne products, none of them this one. No complaint or settlement is recorded. Open ↗ (opens in a new tab)
14. California Attorney General Prop 65 notice 2025-02343 (Thorne Research). Certifier or regulator listing. Lead in Thorne Daily Greens Plus. No complaint, settlement or judgment recorded as of 2026-10-23. Open ↗ (opens in a new tab)
15. California Attorney General Prop 65 notice 2025-03196 (Thorne Research). Certifier or regulator listing. Lead in Thorne Daily Electrolytes Drink Mix, Watermelon. No complaint, settlement or judgment recorded as of 2026-10-23. Open ↗ (opens in a new tab)
16. openFDA drug enforcement records for Thorne. Certifier or regulator listing. Two Class II recalls begun 2014-06-12 of Captomer, sold as a supplement but made from DMSA, the active ingredient of an approved drug, so FDA treated it as an unapproved drug; both terminated 2014-10-15. Open ↗ (opens in a new tab)
17. Reddit r/fasting: Magnesium Bisglycinate with monk fruit. Independent source. A user relays that Thorne said the powder has no calories or carbohydrates and is sweetened with monk fruit. We read the post, not the replies. Open ↗ (opens in a new tab)
18. Reddit r/Supplements: Recent Thorne Magnesium Glycinate Batch Feels Different. Independent source. A single user’s report, June 2026. Unverified. Open ↗ (opens in a new tab)

• Momentous Magnesium Bisglycinate Capsules, not powder: 200 mg of magnesium in two capsules, with an NSF Certified for Sport listing and lot certificates the maker posts (two so far). About $17 for 30 servings, roughly $0.57 a serving against Thorne’s $0.87.
• Thorne Magnesium Glycinate capsules (opens in a new tab) 120 mg of magnesium per capsule with hypromellose, silicon dioxide and MCT oil, no sweetener; about $26 for 90. We could not confirm an NSF listing for it, so it is not on our list.
• Food first Magnesium also comes from food. See why it matters and where to get it.

• Types of Magnesium Article Glycinate vs citrate vs oxide vs threonate — which forms work best for what
• Why Magnesium Matters Article Role in 300+ enzymatic reactions and the scope of widespread deficiency
• Sleep and Stress Article Effects on sleep quality, anxiety, and muscle relaxation