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magnesium
Thorne Magnesium BisglycinateReview 2026
Thorne Magnesium Bisglycinate uses one of the most bioavailable magnesium forms with NSF Certified for Sport batch testing. We score it 88/100. CPED $1.25/day at the clinical 300mg dose.
EDE Score
Verdict
Cost per effective day
$1.25 / effective day/ day
Why this verdict
- NSF Certified for Sport every batch
- Bisglycinate chelation = top-tier form
- 200 mg per scoop = single-scoop clinical dose
Verdict: BUY. EDE Score 88/100. Thorne Magnesium Bisglycinate is a clean, well-formulated powder using one of the most bioavailable magnesium forms (bisglycinate chelate) with NSF Certified for Sport batch testing on every container. The only friction point is the 200 mg per scoop dose, which is below the clinical effective range of 300 to 400 mg/day. To reach the studied dose, you need 1.5 to 2 scoops daily, which doubles the cost per effective day to $1.25. Excellent product, mediocre value if you only need elemental magnesium. The bedtime sleep angle is the differentiator that justifies the price.
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At a glance
| Metric | Value |
|---|---|
| Brand | Thorne |
| Product | Magnesium Bisglycinate (powder) |
| Form | Powder, mix with water |
| Servings per bottle | 60 |
| Serving size | 1 scoop (3.77 g) |
| Active ingredient | Magnesium (as magnesium bisglycinate) 200 mg |
| Price (Thorne direct, MAP) | $50.00 |
| CPED (at 300 mg/day clinical dose) | $1.25 per effective day |
| Best-in-class CPED for magnesium | $0.25 to $0.40 (Now Foods, Doctor's Best capsules) |
| Third-party certification | NSF Certified for Sport (listing ID 1205063) |
| EDE Score | 88/100 |
| Verdict | BUY |
Why this product matters for men 40+
Magnesium is the second most-deficient mineral in the US adult population after vitamin D. According to the World Health Organization, as many as 75 percent of US adults do not meet the FDA's recommended daily intake of 420 mg of magnesium. For men 40+, magnesium status is connected to a long list of measurable outcomes: sleep quality, muscle recovery, insulin sensitivity, and a small but documented relationship with testosterone bioactivity1 2.
The challenge for men 40+ is not finding magnesium. The challenge is finding it in a form that gets absorbed (most cheap magnesium is oxide, with roughly 4 percent bioavailability) and at a dose that matches the clinical evidence (300 to 400 mg of elemental magnesium per day).
Thorne Magnesium Bisglycinate is a strong product on form and brand quality. It is mid-pack on dose efficiency because the per-scoop dose is below the clinical range, and on price per effective day because of the dose math.
Editorial commentary
What we are paying attention to with this product: Thorne built this powder around glycine as a deliberate dual-purpose feature. The bisglycinate chelate (two glycine molecules bound to one magnesium ion) is one of the most bioavailable magnesium forms on the market, and glycine itself is a neurotransmitter that promotes relaxation. The product is not just magnesium; it is magnesium plus a calming amino acid by chemical design. That makes it a strong pre-bedtime sleep supplement, not just a generic muscle-cramp mineral.
Where it loses points: 200 mg per scoop is below the bottom of the 300 to 400 mg/day clinical effective range. Thorne's directions even acknowledge this, suggesting one to two scoops daily. Two scoops is 400 mg, at the top of the clinical range, but cuts the bottle's effective duration from 60 days to 30 days and pushes the CPED to $1.67 if you take it at the upper dose. We score the product at 1.5 scoops/day (300 mg, low end of the clinical range), which gives a CPED of $1.25.
For comparison, a Doctor's Best Magnesium Glycinate-Lysinate capsule bottle delivers 200 mg per 2 capsules at around $0.30 per effective day. Thorne wins decisively on form quality, NSF certification, and the glycine sleep-support angle. Doctor's Best wins on raw price.
What is actually in it
| Ingredient | Form | Dose per serving | Clinical effective dose | % of effective dose | Evidence level |
|---|---|---|---|---|---|
| Magnesium | Magnesium bisglycinate | 200 mg | 300-400 mg/day | 67% (at 1 scoop) | Strong |
Other ingredients: Citric acid, monk fruit concentrate.
That is the entire ingredient list. No proprietary blend, no flavor masking, no sweeteners beyond monk fruit. Gluten-free, dairy-free, soy-free per the manufacturer.
To hit the 300 mg/day clinical effective dose, you need 1.5 scoops. To hit 400 mg (top of range), you need 2 scoops. Single-scoop dosing at 200 mg is sub-clinical for the testosterone and physical performance literature, although it can still meaningfully contribute to overall daily intake when stacked with dietary magnesium.
EDE Score breakdown
| Criterion | Weight | Score (0-100) | Weighted | Notes |
|---|---|---|---|---|
| Dose Efficacy | 30% | 80 | 24.0 | 200 mg per scoop = below 300-400 mg clinical range. Requires 1.5-2 scoops/day. |
| Bioavailability | 20% | 92 | 18.4 | Bisglycinate is one of the most-absorbable magnesium forms. |
| Third-Party Testing | 15% | 100 | 15.0 | NSF Certified for Sport, batch verified. |
| Label Transparency | 15% | 100 | 15.0 | Single ingredient, full disclosure, no blend. |
| Manufacturer Reputation | 10% | 95 | 9.5 | Clean FDA record, 100+ pro sports teams. |
| Community Sentiment | 5% | 50 | 2.5 | Default in Phase 1, enriched Q3 2026. |
| Price Per Effective Dose | 5% | 65 | 3.25 | $1.25/day = mid-tier ($1.01 to $1.50 range). |
| EDE Score | 100% | 88 / 100 | BUY |
See our methodology for the full formula, weights, and tier definitions.
What we like
- Bisglycinate chelate is genuinely top-tier form. Two glycine molecules bind the magnesium, producing a true amino acid chelate. This delivers more usable magnesium per mg with substantially less GI distress than citrate or oxide. The form quality is not marketing; it is chemistry.
- NSF Certified for Sport on every batch. Listing ID 1205063 in the active NSF database. Tested for the absence of nearly 300 banned substances. The certification accepted by the NFL, MLB, NHL, MLS, PGA, CFL, and Olympic athletic organizations.
- Glycine is a feature, not a filler. Bisglycinate is two glycines bound to one magnesium. Glycine itself is a calming neurotransmitter. This makes the product effective at pre-bedtime dosing in a way that magnesium oxide or magnesium citrate is not.
- No artificial sweeteners, dyes, or fillers. Citric acid and monk fruit concentrate. Lightly sweetened. Mixes cleanly with water.
What we don't like
- Sub-clinical dose per serving. 200 mg per scoop is below the bottom of the 300 to 400 mg/day clinical effective range used in human trials for testosterone, sleep, and muscle outcomes. To match the studied dose, you need 1.5 to 2 scoops daily, which compresses the bottle's effective duration.
- CPED is mid-pack at the clinical dose. At 300 mg/day (1.5 scoops), the bottle lasts 40 days, giving a CPED of $1.25. Many capsule competitors deliver the same elemental magnesium at $0.25 to $0.40 per effective day. You are paying a premium for form, brand, certification, and the glycine sleep angle.
- Powder format is friction for some users. You need to mix it with at least 8 ounces of water. If your routine does not include a daily water-mixing step, capsules are easier. The same active form is available in capsule format from other brands, sometimes at lower CPED.
- No magnesium-elemental disclosure shortcut. The 200 mg figure is elemental magnesium per scoop (this is correct labeling). Some users mistakenly read "200 mg" as the chelate weight. The Thorne label is correct; the confusion is on consumer-side reading.
Cost per effective day (CPED)
Bottle price: $50.00 (Thorne direct, MAP)
Total elemental Mg per bottle: 60 scoops * 200 mg = 12,000 mg
Clinical effective dose per day: 300 mg (low end of 300-400 mg range)
Days of effective dosing: 12,000 mg / 300 mg = 40 days
CPED: $50.00 / 40 = $1.25 per effective day
Thorne Magnesium Bisglycinate costs $1.25 per effective day at the 300 mg/day clinical dose. If you take 2 scoops/day (400 mg, top of clinical range), the CPED rises to $1.67 because the bottle now only lasts 30 days.
For comparison, the lowest-CPED tier on our magnesium grid is $0.25 to $0.40 per effective day, achieved by capsule products from Now Foods, Doctor's Best, and Solgar. Thorne sits at roughly 3 to 5 times higher CPED for the same elemental magnesium delivery.
The premium is justified if you value: NSF Certified for Sport batch testing, the bisglycinate form (vs. cheaper citrate or oxide), and the glycine sleep-support angle. The premium is not justified if you only need cheap elemental magnesium.
Ingredient-by-ingredient analysis
Magnesium (as magnesium bisglycinate)
Dose in this product: 200 mg per scoop (elemental magnesium) Clinical effective dose: 300-400 mg/day for men 40+ (NIH ODS, plus randomized trial data on testosterone, sleep, and muscle performance)1 2 Evidence level: Strong Verdict for this ingredient: Below clinical range at 1 scoop, in range at 1.5 to 2 scoops
Magnesium is essential for the activity of more than 600 enzymes in the human body3. For men 40+, the relevant clinical evidence converges on three areas:
Testosterone bioactivity. A 2014 review in International Journal of Endocrinology by Maggio and colleagues synthesized observational and intervention data showing that magnesium status modulates testosterone bioavailability through SHBG (sex hormone-binding globulin) interaction1. The mechanism is established; the clinical effect size in older men is modest. The authors conclude that men with impaired magnesium status and testosterone deficiency could benefit from magnesium supplementation as part of physical performance protocols.
Direct testosterone elevation. A 2011 study by Cinar and colleagues in Biological Trace Element Research found that 4 weeks of magnesium supplementation at approximately 10 mg/kg/day (around 700 mg/day for an 70 kg subject) increased free and total testosterone in healthy sedentary men and athletes after exhaustion compared to baseline4. The dose used in this study is at the upper end of safe daily intake; most clinicians work with the more conservative 300 to 400 mg/day range.
Muscle performance. Magnesium supplementation in young men following a 7-week strength training program produced significant gains in muscle strength and power, with the effect more pronounced at 500 mg/day than at 250 mg/day1.
Sleep quality. A 2012 randomized double-blind placebo-controlled trial in elderly insomniacs found that magnesium supplementation at 500 mg/day improved sleep efficiency, sleep time, and serum magnesium concentration vs. placebo5. The bisglycinate form, with its embedded glycine, is particularly studied in this context.
The bisglycinate form sits at score 92 in our bioavailability table, second only to magnesium L-threonate (score 95) and substantially above magnesium oxide (score 25). Bisglycinate delivers more elemental magnesium per absorbed mg than oxide or sulfate, and produces less GI distress than citrate at therapeutic doses.
For our scoring, the dose efficacy criterion is the limiting factor: 200 mg per single scoop is below the bottom of the clinical effective range. This is not a label deception; Thorne's directions correctly suggest one to two scoops daily. It does, however, mean the per-scoop convenience math does not match the per-day dose math.
Community sentiment summary
Community sentiment is one signal among seven and is weighted 5% in the EDE Score. In Phase 1 of the DosedWise project, this criterion uses a default neutral score of 50/100. The Reddit Intelligence layer for automated sentiment analysis across r/Magnesium, r/Sleep, r/Nootropics, and r/Supplements ships in Q3 2026, at which point this section will be replaced with quantitative sentiment data from the past 90 days.
Anecdotal observation across men's-health and biohacking communities: Thorne Magnesium Bisglycinate is consistently named as a top-tier magnesium powder, with the most common positive themes being sleep quality improvement and clean ingredient profile. The most common negative themes are the price relative to capsule alternatives and the per-scoop dose being below the clinical range. The form factor (powder mixed in water) divides users: those with a nightly hydration routine love it, those who prefer pills find it inconvenient.
This summary is editorial commentary and is not yet weighted into the EDE Score. The score above already accounts for the 5% Community Sentiment weight at the Phase 1 default value.
Compared to alternatives
For magnesium supplements, here is how Thorne Magnesium Bisglycinate compares to top alternatives we have audited:
| Product | Form | EDE Score | CPED | Verdict |
|---|---|---|---|---|
| Thorne Magnesium Bisglycinate | Powder, bisglycinate | 88/100 | $1.25 | BUY |
| Doctor's Best Magnesium Glycinate-Lysinate | Capsule, glycinate-lysinate chelate | 92/100 | $0.30 | TOP PICK |
| Pure Encapsulations Magnesium Glycinate | Capsule, glycinate | 90/100 | $0.55 | BUY |
| Now Foods Magnesium Citrate | Capsule, citrate | 82/100 | $0.18 | BUY |
| Momentous Magnesium L-Threonate | Capsule, L-threonate (Magtein) | 81/100 | $1.45 | BUY |
| Generic Amazon magnesium oxide 500 mg | Capsule, oxide | 35/100 | $0.05 | SKIP |
Thorne wins on form quality and certification rigor versus most alternatives. Doctor's Best wins decisively on CPED while keeping a chelate form. Now Foods Magnesium Citrate is the cheapest tolerable form. Momentous Magnesium L-Threonate is the only product in this set with brain-bioavailable form, but at higher CPED and lower dose efficacy. Generic Amazon magnesium oxide scores in SKIP territory because the form is poorly absorbed regardless of how cheap the bottle looks.
Who should buy this
Thorne Magnesium Bisglycinate is best for:
- Men 40+ who want a high-quality magnesium powder for pre-bedtime use, where the glycine content reinforces sleep support beyond just the magnesium itself.
- Athletes who need NSF Certified for Sport supplements and prefer powder format over capsules.
- Men who already drink water before bed and can integrate the daily mix easily into their routine.
- Buyers who value brand reputation and certification rigor over per-mg cost.
Thorne Magnesium Bisglycinate is NOT for:
- Cost-optimizers who only need elemental magnesium. Capsule alternatives (Doctor's Best, Pure Encapsulations) deliver the same active form at one-third the CPED.
- Men with serious daytime magnesium needs requiring 600+ mg/day (the bottle would last only 20 to 30 days at that dose).
- Men who prefer capsules or struggle to remember to mix powders.
- Buyers looking for brain-targeted magnesium (use magnesium L-threonate / Magtein form instead).
Stacking notes
Magnesium pairs cleanly with the rest of the men's-health basics:
- Vitamin D3 + K2 MK-7 at 2,000 to 5,000 IU/day. Magnesium is a cofactor for vitamin D metabolism, so the two work synergistically.
- Zinc bisglycinate or picolinate at 15 to 30 mg/day. Separate by a few hours from a high magnesium dose to avoid competitive intestinal absorption at extremes.
- Boron citrate at 6 to 10 mg/day, any time.
- Glycine on its own if you want to push the calming/sleep effect harder than the bisglycinate alone delivers (typical add-on dose: 3 g glycine 30 minutes before bed).
For pre-bedtime use, take Thorne Magnesium Bisglycinate 30 to 60 minutes before sleep. The glycine takes about that long to cross the blood-brain barrier and modulate central nervous system signaling.
If you want the full picture of the men's-health stack, see our best testosterone supplements for men 40+ pillar and our magnesium for men 40+ buyer guide.
Better alternatives
If Thorne Magnesium Bisglycinate does not fit your needs, consider:
- Doctor's Best Magnesium Glycinate-Lysinate (EDE 92/100, CPED $0.30): Same chelate-class form, capsule format, lower CPED. The pragmatic TOP PICK for daily elemental magnesium without the powder ritual.
- Pure Encapsulations Magnesium Glycinate (EDE 90/100, CPED $0.55): Capsule format, single-ingredient magnesium glycinate, cleaner brand transparency. A solid second pick if you avoid Thorne for any reason.
- Momentous Magnesium L-Threonate (EDE 81/100, CPED $1.45): If you specifically want brain-targeted magnesium (cognitive function, memory) versus general elemental magnesium support. Higher CPED but a genuinely different mechanism (Magtein crosses the blood-brain barrier in a way other forms do not).
Frequently asked questions
Is Thorne Magnesium Bisglycinate worth buying?
Yes, with a caveat. With an EDE Score of 88/100, this is a high-quality product in a top-tier form (bisglycinate), with NSF Certified for Sport batch testing and the bonus glycine sleep-support angle. The caveat is the CPED ($1.25/day at clinical dose), which is 3 to 5 times the cost of capsule alternatives delivering the same elemental magnesium. The premium is justified if you value form, certification, and pre-bedtime sleep use; not if you only need cheap magnesium.
What is the best dose of magnesium for men 40+?
The clinical effective range is 300 to 400 mg of elemental magnesium per day. Below 300 mg/day is generally considered maintenance dosing rather than therapeutic; above 400 mg/day approaches the FDA tolerable upper intake from supplements (350 mg/day for adults, with diet contributing the remainder up to the total RDA of 420 mg/day for adult men)3. The 1 scoop = 200 mg dose of Thorne Magnesium Bisglycinate is below this range; you need 1.5 to 2 scoops to land inside the clinical window.
Why is the CPED higher than capsule alternatives?
Three reasons stack together. First, the per-scoop dose (200 mg) requires multiple scoops daily to hit clinical range, compressing the bottle's effective duration. Second, Thorne charges a brand premium for NSF Certified for Sport testing on every batch, which costs the manufacturer more than uncertified production. Third, the powder form factor includes packaging and excipient costs (citric acid, monk fruit) that capsule formulas do not require. The premium is a real cost on the manufacturer side; whether it is worth it to you depends on your priorities.
Is Thorne Magnesium Bisglycinate the same as magnesium glycinate?
Effectively yes, with one nuance. "Bisglycinate" emphasizes that there are two glycine molecules bound to each magnesium ion (bis = two), forming a true chelate. "Glycinate" is sometimes used loosely to describe the same compound, but can also include partial-chelate or buffered forms with lower glycine content. Thorne's bisglycinate is fully chelated, which is the form with the strongest absorption and tolerability data.
Will Thorne Magnesium Bisglycinate cause GI issues?
Less than most magnesium forms. The bisglycinate chelate is one of the gentlest forms of magnesium on the digestive system because the magnesium is fully enveloped by glycine, reducing direct gut wall irritation. This contrasts with magnesium oxide or magnesium citrate, which can cause loose stools or diarrhea at therapeutic doses. Some individuals will still experience mild gas or bloating; this typically resolves when the dose is reduced.
How does this compare to Momentous Magnesium L-Threonate?
Different mechanisms, different use cases. Magnesium L-threonate (Magtein) is the only magnesium form that crosses the blood-brain barrier in meaningful quantity, making it the form of choice for cognitive-function and memory-support use. Magnesium bisglycinate works systemically (heart, muscle, sleep) and is more cost-efficient per mg of elemental magnesium. If your goal is brain-targeted, choose threonate. If your goal is general magnesium status, sleep, and recovery, choose bisglycinate.
Where to buy
This product is widely available across US retailers. Pricing as of audit date (2026-05-03):
- Thorne direct at the official site. Often ships fastest and is eligible for FSA/HSA via Truemed.
- Amazon if you want Prime delivery and already have an Amazon supplement subscription cadence.
- iHerb typically competitive on per-scoop price, especially with iHerb promotions.
Cross-check the price across all three on order day. The CPED math we report above is based on the Thorne direct price; aggressive iHerb promotions can push the per-scoop cost down further.
Final verdict
BUY: Thorne Magnesium Bisglycinate is a top-quality magnesium powder with a sleep-support edge, priced at a premium that some buyers will justify and others will not.
The EDE Score of 88/100 reflects the trade-off at the heart of this product. Bisglycinate form (score 92), NSF certification, label transparency, and Thorne's manufacturing reputation are all near-perfect. Dose efficacy (score 80) and price per effective day (score 65) are mid-pack because the per-scoop dose is below clinical range and the powder format adds cost vs. capsules.
Buy this if you want a pre-bedtime magnesium-plus-glycine routine and you value NSF Certified for Sport rigor. Skip to a cheaper capsule chelate (Doctor's Best Magnesium Glycinate-Lysinate at $0.30/day, EDE 92) if you only need elemental magnesium without the ritual or the certification.
If you decide to buy:
- Buy direct from Thorne (paid link)
- Buy on Amazon (paid link)
- Buy on iHerb (paid link)
Methodology and disclosures
This review uses the DosedWise Methodology v1.0. The EDE Score formula is:
EDE Score =
(Dose Efficacy * 0.30) +
(Bioavailability * 0.20) +
(Third-Party Testing * 0.15) +
(Label Transparency * 0.15) +
(Manufacturer Reputation * 0.10) +
(Community Sentiment * 0.05) +
(Price Per Effective Dose * 0.05)
DosedWise earned no payment from Thorne for this review. We may earn affiliate commissions when readers purchase through links on this page. These commissions never influence scoring. Read our editorial policy.
This article is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before starting any supplement, especially if you have a medical condition or take prescription medications.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Community Sentiment is set to a default of 50 in Phase 1 of the DosedWise project. This criterion will be enriched with Reddit and forum data via the DosedWise Reddit Intelligence layer in Q3 2026, at which point this review will be revised.
References
Published: 2026-05-03 Last reviewed: 2026-05-03 Next scheduled review: 2026-11-03 (every 6 months minimum) Author: DosedWise Editorial Team
Footnotes
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Maggio M, De Vita F, Lauretani F, Nouvenne A, Meschi T, Ticinesi A, Dominguez LJ, Barbagallo M, Dall'aglio E, Ceda GP. The Interplay between Magnesium and Testosterone in Modulating Physical Function in Men. Int J Endocrinol. 2014;2014:525249. PMC3958794. Synthesizes the mechanism by which magnesium status modulates testosterone bioactivity through SHBG interaction in older men. ↩ ↩2 ↩3 ↩4
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Maggio M, Ceda GP, Lauretani F, Cattabiani C, Avantaggiato E, Morganti S, Ablondi F, Bandinelli S, Dominguez LJ, Barbagallo M, Paolisso G, Semba RD, Ferrucci L. Magnesium and anabolic hormones in older men. Int J Androl. 2011 Dec;34(6 Pt 2):e594-600. PMC4623306. Reviews the relationship between magnesium serum levels and anabolic hormones (testosterone, IGF-1) in older male populations. ↩ ↩2
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NIH Office of Dietary Supplements. Magnesium Fact Sheet for Health Professionals. Available at: ods.od.nih.gov/factsheets/Magnesium-HealthProfessional. Reference for the 420 mg/day RDA for adult men, the 350 mg/day tolerable upper intake from supplements, and the role of magnesium in 600+ enzymatic reactions. ↩ ↩2
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Cinar V, Polat Y, Baltaci AK, Mogulkoc R. Effects of magnesium supplementation on testosterone levels of athletes and sedentary subjects at rest and after exhaustion. Biol Trace Elem Res. 2011 Apr;140(1):18-23. PubMed PMID: 20352370. 4-week magnesium supplementation increased free and total testosterone in healthy sedentary men and athletes after exhaustion. ↩
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Abbasi B, Kimiagar M, Sadeghniiat K, Shirazi MM, Hedayati M, Rashidkhani B. The effect of magnesium supplementation on primary insomnia in elderly: A double-blind placebo-controlled clinical trial. J Res Med Sci. 2012 Dec;17(12):1161-1169. PubMed PMID: 23853635. 500 mg/day magnesium improved sleep efficiency and serum magnesium versus placebo. ↩
Every score on this page comes from the same DosedWise methodology. Affiliate commissions never influence scoring.