Our verdict
Thorne's Magnesium Bisglycinate is a lightly sweetened powder with 200 mg of elemental magnesium per scoop and 60 scoops per container. It carries NSF Certified for Sport, which puts it on tier 1 of our evidence ladder. At $52 it works out to about $0.43 per 100 mg, the highest in this comparison. It suits people who prefer to drink their magnesium or who need certified products. Note that the certification covers this powder, not every Thorne magnesium product.
Best for: Athletes who want a certified powder they can mix into a drink.
Check Thorne's current price, shipping and return terms on the seller's site.
We may earn a commission from qualifying purchases. Our rating method is independent of compensation.
Dose, formula and the elemental magnesium calculation
The label lists 200 mg of elemental magnesium as TRAACS magnesium bisglycinate chelate per scoop, with 60 servings. Other ingredients are citric acid and monk fruit concentrate.
A flavored powder is a different experience from a neutral capsule. Some people like mixing it into water at night; others prefer to avoid sweeteners, even natural ones.
Testing and manufacturing: what has actually been verified?
The label and product page show NSF Certified for Sport for this powder (item M204). NSF certification includes label-claim and contaminant testing and screening for substances banned in sport. That places it on tier 1 of our evidence ladder.
Thorne sells other magnesium products, including glycinate capsules. Don't assume the powder's certification applies to them; check each product in the NSF directory (opens in a new tab).
Evidence tiers: tier 1 is publicly verifiable, product-specific evidence; tier 2 is product-specific evidence our editors verified privately; tier 3 is manufacturer-level information without finished-product results; tier 4 is unverified. Full definitions.
Price and value: the fair way to compare
| Option | Price | Per serving | Per 100 mg |
|---|---|---|---|
| One-time, 60 scoops (187 g) | $52.00 | $0.87 | $0.43 |
Thorne's product page did not list a subscription price. Retailer prices for the same item ranged from about $48 to $53. We compare one-time prices on the same date across brands, never a sale price against another brand's list price. Cost per 100 mg is a comparison tool, not a dose recommendation.
Cost per 100 mg across all eight
We may earn a commission from qualifying purchases. Our rating method is independent of compensation.
Customer reviews, reputation and support
Thorne's product page showed no reviews when we checked, so we have no brand-page review sample to weigh.
We weigh verified-purchase feedback, sample size, review dates and repeated complaints such as tablet size, stomach upset or shipping delays. We don't treat self-reported sleep changes or a five-star average as clinical evidence.
Claims check
Thorne describes the powder as supporting restful sleep and muscle relaxation. Those are claims about magnesium's normal roles, not proof that this product improves sleep or recovery. See magnesium for muscle recovery.
Who should consider it, and who might choose an alternative?
Pros
- NSF Certified for Sport on this powder
- 200 mg per scoop, 60 servings
- Two-ingredient flavor system
Cons
- Highest cost per 100 mg here (about $0.43)
- Flavored powder, not a neutral capsule
- No reviews on the brand page
Alternatives worth comparing
Frequently asked questions
How much elemental magnesium does Thorne provide?
200 mg of elemental magnesium per scoop of powder, with 60 scoops per container.
Is Thorne magnesium third-party tested?
This powder is NSF Certified for Sport. That doesn't automatically apply to other Thorne magnesium products.
Is Thorne magnesium good for sleep?
There isn't strong evidence that any magnesium supplement treats insomnia. Thorne's certification is about quality, not sleep results.
Is Thorne the best value?
No. At about $0.43 per 100 mg it is the most expensive per 100 mg in our comparison.
How we reviewed Thorne
We reviewed the product page, Supplement Facts, price and any testing documents on November 10, 2026, and compared them with the published human research. We have not lab tested this product ourselves. Rankings follow how we score supplement quality, and the same criteria apply to every brand. Read our affiliate disclosure, magnesium glycinate versus other forms, magnesium glycinate sleep evidence and magnesium for muscle and exercise.
Sources
- thorne.com product page, checked Nov 10, 2026
- NIH Office of Dietary Supplements. Magnesium: Fact Sheet for Health Professionals.
- Lopresti AL, Smith SJ, Drummond PD. Magnesium Supplementation for Sleep in Adults: A Systematic Review of Randomized Controlled Trials. Journal of Dietary Supplements, 2026.
- Schuster J, Cycelskij I, Lopresti A, Hahn A. Magnesium Bisglycinate Supplementation in Healthy Adults Reporting Poor Sleep: A Randomized, Placebo-Controlled Trial. Nature and Science of Sleep, 2025.
Last source review: November 10, 2026. Next scheduled price check: December 2026. Spot an error? See our corrections policy.