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Magnesium

Klean Magnesium

90 vegetarian capsules (SKU KA202599-90), 120 mg magnesium as magnesium glycinate per capsule

$26.50US price, checked Oct 24, 2026

120 mg magnesium glycinate capsule that NSF's Certified for Sport database lists

Check price at Klean Athlete Full review →

Magnesium

Thorne Magnesium Bisglycinate

Powder, 60 scoops (SKU M204), 200 mg magnesium as magnesium bisglycinate per scoop, sweetened with monk fruit

$52US price, checked Oct 23, 2026

200 mg magnesium bisglycinate powder with an NSF Certified for Sport listing

Check price at Thorne Full review →

Criterion	Klean Magnesium	Thorne Magnesium Bisglycinate
US price	$26.50Checked Oct 24, 2026 · Price details in the review	$52Checked Oct 23, 2026 · Price details in the review
Three-year ownership estimate	$348.91 Planning total.	$1,000.99 Planning total.
Choose if	You want a 120 mg magnesium glycinate capsule that NSF's Certified for Sport database lists, with lot numbers you can check.	You want a magnesium drink powder with a short ingredient list and an NSF sport listing you can check by lot number.
Main trade-off	Klean's directions allow up to 480 mg a day, above NIH's 350 mg upper limit for supplemental magnesium.	It costs about $0.87 a scoop, and approved returns carry a 25% restocking fee.
Key specifications	Dose per serving: 120 mg magnesium as magnesium glycinate per capsule (29% of the Daily Value). Klean's directions are 1 capsule, 1 to 4 times daily Servings per container: 90 capsules at 1 capsule a serving, on Klean's label and in NSF's listings Price per serving: About $0.29 a capsule at the $26.50 retail price, or about $1.18 a day at 4 capsules Dose vs. upper limit: One capsule is 120 mg, under the 350 mg adult upper limit for magnesium from supplements and medications. Three capsules reach 360 mg, and the four Klean's directions allow reach 480 mg Other ingredients: Hydroxypropyl methylcellulose (vegetarian capsule) and ascorbyl palmitate. The label has no allergen statement Certification: NSF Certified for Sport lists two US entries for the 90-capsule product, with 11 and 13 certified lots Free-of statements: Klean's page shows gluten free, GMO free, vegan and vegetarian icons. NSF's entries list gluten free, GMO free and vegan claims Warning: Klean's label says to consult a health professional first if you're pregnant or lactating, have a health condition or take medication Where to buy: Klean's page lists a retail price but asks for a login to add to cart. Its shop address forwarded to a Klean Athlete storefront on Amazon on Oct 24, 2026	Dose per serving: 200 mg magnesium as magnesium bisglycinate (1 scoop). Thorne's page shows no % Daily Value Servings per container: 60 scoops Price per serving: About $0.87 at the $52 one-time list price Dose vs. upper limit: 200 mg per scoop, under the 350 mg adult upper limit for magnesium from supplements and medications Other ingredients: Citric acid, monk fruit concentrate. Labeled gluten free, dairy free and soy free Certification: NSF Certified for Sport. NSF lists it as an unflavored powder, 1 scoop (3.77 g) per serving, 7.98 oz (226.2 g) package, with 21 certified lots Directions: 1 scoop daily in at least 8 oz of water. For sleep, Thorne suggests 30 to 60 minutes before bed Side effects: Thorne says some people get gas, bloating or diarrhea, and that it resolves when the amount is reduced
Exact variant	90 vegetarian capsules (SKU KA202599-90), 120 mg magnesium as magnesium glycinate per capsule	Powder, 60 scoops (SKU M204), 200 mg magnesium as magnesium bisglycinate per scoop, sweetened with monk fruit
Dimensions	Not stated by the manufacturer. Klean's page gives 90 vegetarian capsules per container, but no bottle size, net weight or capsule size. NSF's listings give a package size of 90 and a serving size of 1 capsule.	Not stated by the manufacturer. Thorne's page gives 60 one-scoop servings per tub, but no container size or net weight. NSF's listing gives a 3.77 g scoop and a package size of 7.98 oz (226.2 g). That matches 60 scoops, but NSF doesn't tie it to SKU M204.
Installation	No installation. Klean's label says adults take 1 capsule, 1 to 4 times daily, or as a trainer, coach or health professional directs. The label doesn't mention food, but Klean's 2020 data sheet says to take it with a meal. The label says to use it only if the safety seal is intact and to store it in a cool, dry place.	No installation. Thorne's directions are to mix 1 scoop with at least 8 ounces of water daily, or as your health-care practitioner recommends. For sleep, Thorne suggests taking it 30 to 60 minutes before bed, with or without food.
Materials	Each capsule holds 120 mg of magnesium as magnesium glycinate, which the label lists as 29% of the Daily Value. The other ingredients are hydroxypropyl methylcellulose (the vegetarian capsule) and ascorbyl palmitate. Klean's page shows gluten free, GMO free, vegan and vegetarian icons. The label has no allergen statement. Klean doesn't name the magnesium's source or say what the bottle is made of. The label says it's manufactured for Klean Athlete, Pittsburgh, Pennsylvania.	Each scoop holds 200 mg of magnesium as magnesium bisglycinate. The other ingredients are citric acid and monk fruit concentrate. Thorne calls the powder lightly sweetened but doesn't name a flavor, and NSF lists it as unflavored. It's labeled gluten free, dairy free and soy free. Its badges also say "derived from natural flavors" and "derived from natural colors," though the ingredient list names neither. Thorne doesn't name the magnesium supplier or the tub material.
Warranty	Klean gives no warranty term, per its return policy. The policy says Klean guarantees quality, purity and potency through the expiration date.	Not stated by the manufacturer. Neither the product page nor Thorne's returns FAQ mentions a warranty.
Returns	30 days from receipt, with preauthorization and a 15% processing fee plus shipping. Klean's return policy says claims of shortage or damage must be made within 7 days of receiving the package. Authorized returns must reach Klean within 14 days of authorization. Returns are credited on receipt, less the 15% fee and the cost of shipping. The policy doesn't say whether an opened bottle qualifies.	Thorne's returns FAQ says you can request a return within 60 days of buying from Thorne. Its 60-Day Satisfaction Guarantee covers purchases from Thorne's website or authorized US sellers, for a refund or a product credit. All approved returns carry a 25% restocking fee. Thorne generally doesn't refund or exchange product past its expiration date. The page doesn't say who pays return shipping. For opened products, it only asks you to call Customer Service.
Unresolved questions	Which NSF entry a given bottle's lot number sits in, and the certification date, which neither entry shows Whether the page's retail price applies to every buyer, since it asks you to log in Whether an opened bottle qualifies for return Who makes the magnesium glycinate and where it comes from Klean's bottle size and net weight Whether Klean's current directions call for a meal, since only its 2020 data sheet says so Whether the page's description means 120 mg of magnesium or of the glycinate compound, since the label panel says magnesium	Who supplies the magnesium bisglycinate: Thorne doesn't name a source Whether a given tub's lot number is among the 21 lots NSF lists Net weight and container size, which Thorne doesn't state What backs Thorne's claim that it's well absorbed, since the page cites no study Who pays return shipping

These comparisons use published specifications, not head-to-head tests. Prices and terms are dated. Unknown costs are not zero. Check the exact variant before you buy.