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SUPPLEMENTS·THORNE
Thorne Magnesium Bisglycinate Powder (60 servings)
Editor score8.7/10
Best for: Drug-tested athletes, tablet-haters, flexible dosing
Price
Check price
At Amazon · price changes often, check before buying
Buy at Amazon ↗Updated 2026-08-02
Dose per serving
200 mg elemental magnesium (1 scoop)
Form
Magnesium bisglycinate powder
Servings
60 scoops (~2 months at 1/day)
The athlete-grade magnesium — NSF Certified for Sport, powder format, same chelate as our value pick at three times the price.
Thorne's bisglycinate is chemically the same magnesium-glycine chelate as Doctor's Best (bisglycinate = glycinate — Thorne's own page says so). What you pay extra for: NSF Certified for Sport testing (the certification competitive athletes need for banned-substance assurance), a lightly monk-fruit-sweetened powder you can dose flexibly in water, and Thorne's practitioner-grade manufacturing. 200 mg elemental magnesium per scoop, 60 scoops. If you're not drug-tested and fine swallowing tablets, the value pick does the same job for less.
Price across 2 retailers
Prices checked 2026-08-02amazon
AmazonBest price✓ Fast delivery · easy returns
NSF Certified for Sport listing
Price varies
Prices shown were last checked on 2026-08-02and can change at any time — the price on the retailer's site at checkout is the one that applies. As an Amazon Associate and affiliate we may earn a commission on purchases made through these links, at no extra cost to you.
How our prices work
We show the lowest price we found at our last check (2026-08-02) and the manufacturer's list price for comparison. Retail prices — Amazon's especially — move constantly, so treat these as a guide: the price shown on the retailer's own page at checkout is the one that applies. Tap through to see each retailer's current price.
Should you buy it?
What we like
- NSF Certified for Sport — banned-substance tested
- Powder = adjustable dose, no horse pills
- Gentle bisglycinate chelate, no laxative effect
- Gluten, dairy and soy free
What to know before buying
- ~$0.87/serving vs pennies for Doctor's Best tablets
- 200 mg/scoop — reaching the studied 300-400 mg range doubles the cost
- Monk-fruit sweetness is polarizing
- Powder is less travel-friendly than capsules
At a glance
Dose per serving200 mg elemental magnesium (1 scoop)
FormMagnesium bisglycinate powder
Servings60 scoops (~2 months at 1/day)
SweetenerMonk fruit (lightly sweet)
CertificationNSF Certified for Sport
Laxative effectMinimal — glycinate chelate
AllergensGluten, dairy, soy free
MixingStirs into water; some prefer smoothies
Best forTested athletes, flexible dosing
Also sold asSingle-serve stick packs
How it scores
How our 8.7/10 breaks down — rated on the dimensions that matter most for supplements, from hands-on testing and verified specs, not the marketing.
Evidence
9/10
Dosing
8/10
Purity
9.5/10
Gentleness
9/10
Value
6.5/10
Compare with alternatives
Quick verdicts for the supplements most often considered alongside the Thorne Magnesium Bisglycinate Powder (60 servings).
VS·HEAD-TO-HEAD
Thorne Magnesium Bisglycinate Powder (60 servings) vs Doctor's Best High Absorption Magnesium Glycinate 200mg (240ct)
The highest-rated magnesium on Amazon for sleep — glycinate form is chelated for maximum absorption without laxative effects.
→ Restless legs, muscle tension, anxiety-driven insomnia, athletes
VS·HEAD-TO-HEAD
Thorne Magnesium Bisglycinate Powder (60 servings) vs NOW Magnesium Citrate 200mg
The budget workhorse — well-absorbed citrate form from a GMP-certified 50-year brand, at the lowest cost per mg in our lineup.
→ Budget magnesium, constipation-prone users
VS·HEAD-TO-HEAD
Thorne Magnesium Bisglycinate Powder (60 servings) vs Life Extension Neuro-Mag Magnesium L-Threonate
The brain-first magnesium — L-threonate is the form studied for crossing into the brain, aimed at racing-mind nights and cognitive support.
→ Racing-mind sleeplessness, cognitive-focused users
Decision support · what no other comparison site has
Take the quiz · 60 secNot sure which one is right for you?
Our 60-second sleep score quiz asks 8 questions and recommends the right sleep gear for your goals. Built by sleep engineers. Free, no signup.
Frequently asked questions
Thorne bisglycinate vs Doctor's Best glycinate — what's the actual difference?
Chemically none — bisglycinate and glycinate are the same chelate, and Thorne's page says so. You're paying for NSF Certified for Sport testing, powder format, and practitioner-brand manufacturing, not a different mineral.
Is one scoop enough for sleep?
One scoop is 200 mg. Much of the sleep research uses 300-400 mg/day, which means 1.5-2 scoops — budget for that if you're targeting the studied range, and split doses to aid absorption.
Why does NSF Certified for Sport matter?
It's batch-testing for substances banned in competitive sport, plus label-claim verification. If you're drug-tested, it's the certification that protects you; if you're not, it's reassurance you may not need to pay for.
Does it cause stomach upset?
Bisglycinate is the gentle form — it skips the laxative effect of oxide and citrate. Thorne notes GI effects like bloating are possible at higher amounts; start at one scoop.
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