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See prices, running costs, specifications and trade-offs side by side. Choose two to four products of the same type.
Magnesium
Powder, 60 scoops (SKU M204), 200 mg magnesium as magnesium bisglycinate per scoop, sweetened with monk fruit
$52US price, checked200 mg magnesium bisglycinate powder with an NSF Certified for Sport listing
Check price at Thorne for Thorne Magnesium Bisglycinate Full review →
Our magnesium pick
60 capsules (30 servings), 200 mg elemental magnesium as bisglycinate per two-capsule serving, the only size on Momentous's online store
$16.99US price, checked200 mg magnesium bisglycinate in two capsules, with an NSF sport listing
Check price at Momentous for Momentous Magnesium Bisglycinate Full review →| Criterion | Thorne Magnesium Bisglycinate | Momentous Magnesium Bisglycinate |
|---|---|---|
| US price | $52Checked Oct 13, 2026 · Price details in the review | $16.99Checked Oct 13, 2026 · Price details in the review |
| Three-year ownership estimate | $1,000.99 Planning total. | $637.12 Planning total. |
| Choose if | You want a magnesium drink powder with a short ingredient list and an NSF sport listing you can check by lot number. | You want a labeled 200 mg of magnesium bisglycinate in capsules, with an NSF sport listing, for under $17 a bottle. |
| Main trade-off | It costs about $0.87 a scoop, and approved returns carry a 25% restocking fee. | A bottle lasts only 30 days, and delivered bottles generally can't be returned. |
| Key specifications |
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| Exact variant | Powder, 60 scoops (SKU M204), 200 mg magnesium as magnesium bisglycinate per scoop, sweetened with monk fruit | 60 capsules (30 servings), 200 mg elemental magnesium as bisglycinate per two-capsule serving, the only size on Momentous's online store |
| Dimensions | Not stated by the manufacturer. Thorne's page gives 60 one-scoop servings per tub, but no container size or net weight. NSF's Certified for Sport 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 the listing to SKU M204. | Momentous doesn't state the bottle's dimensions. Momentous's online store lists a weight of 3.0 oz (85 g) for the 60-capsule bottle. |
| Installation | 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. | No installation. Momentous's directions are 2 capsules daily in the evening, about 30 to 60 minutes before bed. |
| Materials | 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 say what the tub is made of. | The magnesium is magnesium bisglycinate, which Momentous says is chelated to glycine, an amino acid. It doesn't name the supplier. The Supplement Facts image lists hypromellose, silica, magnesium stearate and microcrystalline cellulose as the other ingredients. The label is marked vegan, gluten free and GMO free, and NSF's listing carries the same free-of claims. Momentous doesn't state what the bottle is made of. The descriptions of its product images disagree: one shows a black opaque bottle, another an amber glass one. |
| Warranty | Not stated by the manufacturer. Neither the product page nor Thorne's returns FAQ mentions a warranty. | Not stated by the manufacturer. The product page shows no warranty, money-back or satisfaction guarantee, and the refund policy mentions none. |
| Returns | 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. The catch is that 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. | Momentous's refund policy says it generally doesn't accept returns of delivered products, except where the law requires it. Original and return shipping costs aren't refundable either, with the same exception. The policy doesn't limit your rights under consumer protection laws, and it asks you to contact Momentous if there's a problem. It gives no return window. You generally have at least 60 minutes after ordering to make changes. If you bought from a retailer, the policy says to contact that retailer. |
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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.