THORNE - Magnesium Bisglycinate - Powdered Magnesium Formula - Supports Restful Sleep…
- Magnesium
A powdered, NSF certified magnesium bisglycinate for buyers who want batch tested purity or a gentler magnesium form than oxide.
As an Amazon Associate, ProductDome may earn a commission from qualifying purchases made through links on this page.
How it ranks among the 108 magnesium we track
4.3★ across 2,500 Amazon ratings, Bayesian-smoothed toward the category average.
2,500 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
10,000+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 108 magnesium we track - how the scorecard works · full magnesium data report. Confidence: limited - incomplete product information.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
THORNE's Magnesium Bisglycinate is a powdered magnesium formula sold as a 60 serving supply, using the bisglycinate (glycinate) form of magnesium rather than oxide or citrate. It carries NSF Certified for Sport status.
Bisglycinate is a chelated form some people choose because it is generally gentler on digestion than magnesium oxide. The NSF Certified for Sport mark means each batch is tested for banned substances, a detail aimed at competitive athletes.
- 60 servings
- NSF Certified for Sport
- Gluten, dairy and soy free
- Magnesium bisglycinate form
Who it's for
Suited to people who want a magnesium form less likely to cause digestive upset, and to athletes who need supplements screened for banned substances. Not the pick if you specifically want capsules rather than a powder to mix.
Strengths and trade-offs
Drawn from this product's published specifications.
- NSF Certified for Sport, batch tested for banned substances
- Bisglycinate form, generally gentler on digestion
- Free from gluten, dairy and soy
- Powder format requires mixing rather than swallowing a pill
- No flavor or dosing detail provided beyond 60 servings
- Model number M204NC has no size or count spec attached
Performance notes
Magnesium bisglycinate is chelated to glycine, a form generally associated with easier digestion than cheaper magnesium oxide, and it is supplied here as a powder rather than a pill.
Specifications
| Brand | THORNE |
|---|---|
| Model | M204NC |
Other THORNE magnesium
How it compares
This product against the closest alternatives we track in magnesium.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| THORNE - Magnesium Bisglycinate - Powdered Magnesium Formula - Supports Restful Sleep…This product | 4.3 / 5 | 2,500 | 2.7 / 5 |
| Nature Made Magnesium Oxide 250 mgNATURE | 4.7 / 5 | 34,500 | 4.6 / 5 |
| NaturalSlim MagicMag Magnesium Citrate Powder for StressNaturalSlim | 4.7 / 5 | 26,700 | 4.6 / 5 |
| NOW Supplements, Magnesium Citrate, Enzyme Function*, Nervous System Support*, 120 Veg…Now | 4.7 / 5 | 25,200 | 4.6 / 5 |
| Life Extension Magnesium CapsLife | 4.7 / 5 | 16,700 | 4.6 / 5 |
Similar magnesium from other brands
Questions about the THORNE M204NC
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Is THORNE Magnesium Bisglycinate NSF certified?
Yes, it carries NSF Certified for Sport status, meaning it is tested for banned substances.
What form of magnesium is in THORNE M204NC?
Magnesium bisglycinate, a chelated form bound to glycine.
Is this magnesium supplement a pill or powder?
It is a powdered formula, sold in a 60 serving supply.