Second active this price does not pay for: organic spinach leaf 50 mg. The price per dose counts elemental magnesium only.
Amount per serving
50mg elemental magnesium
Upper intake level
Adults, 350mg a day, from supplements and medications; magnesium in food does not count toward it. One serving of this product holds 50mg, less than that level on its own. This level is for elemental magnesium only; the panel also prints organic spinach leaf 50 mg, which it does not cover.
An upper intake level is the largest daily intake unlikely to cause harm for most people. It is not a limit on treatment. Higher amounts are sometimes used, but only under the direction and supervision of a health care provider. It is not a recommendation about what to take.
Elemental magnesium as printed on the line's Supplement Facts panel image: "Magnesium (as fermented magnesium bisglycinate) 50 mg 12%" per 1-tablet serving. The panel prints no compound weight, so none is recorded and nothing is derived. It names one salt, fermented magnesium bisglycinate, and no second salt; the product's own name, "Magnesium", names none. The panel prints a serving size and no servings-per-container line; this bottle's own front prints "90 TABLETS | 90 SERVINGS" and the store's variant title is "90 Day | 90ct", so one tablet is one serving and the count is the serving count. The panel's second line is "Organic spinach leaf 50 mg". It is named on this package's row as a second active; the price per dose pays for the 50 mg of magnesium alone, and the marking changes no ranking. The label's CERTIFIED VEGAN and GLUTEN FREE marks are what those two answers rest on.
Delivery
Delivery cost
Applies, amount not published
Delivery is NOT free on this order. It is $24.01 below the $50.00 threshold, and this retailer does not publish a rate, so we cannot tell you what it will add. Free shipping on orders over $50 within the US, from MegaFood's own shipping policy page, first read September 1, 2026: "Q: How much does shipping cost? A: All orders over $50 ship free", with a site-wide banner saying the same. The page read the same on September 28, 2026. No rate is published for orders below $50, so delivered cost under the threshold is Unknown.
Cost per dose delivered
at least $1.16
We will not put a number on this. The product price is a floor, not the price you will pay. Reaching the free-delivery threshold, or choosing a retailer that publishes its rate, is the only way to know in advance.
Set the quantity at the retailer; this calculator does not add items to a cart. Uses the recorded unit price with no coupon or quantity discount. Tax is extra. Delivery terms apply to the contiguous US unless the policy says otherwise.
Free shipping on orders over $50 within the US, from MegaFood's own shipping policy page, first read September 1, 2026: "Q: How much does shipping cost? A: All orders over $50 ship free", with a site-wide banner saying the same. The page read the same on September 28, 2026. No rate is published for orders below $50, so delivered cost under the threshold is Unknown.
Where to buy
MegaFood (direct) · lowest recorded available price
Ordered by price, lowest first, and labeled so you can see what each link earns us. Commission is never an input to that ordering. If the cheapest retailer pays us nothing, that is still the one we send you to. No link on this page earns us anything; every Buy button is a plain retailer link.
Price history
Latest recorded price: $25.99 at MegaFood (direct), checked . Unchanged since we started checking on Oct 20 (7 checks).
We check each price about once a day, so this is the range we recorded, not necessarily every price there has been. It says what changed, not why, and nothing about where the price goes next.
Verification, Tier D: Could not locate independent data
We could not locate independent testing or certification for this product. That is a statement about our search, not about the product. These programs certify what a company submits to them, so a product can be absent simply because it was never entered, which is not a finding against it. Which certifier databases we searched, and when, is listed below. Where a program is not listed there, we have not checked it and do not imply anything either way.
Searched 4 certifier databases and found no listing for this product, and located no published test results. A program not named below was not checked for this product.
Checked NSF Certified for Sport database on Oct 17, 2026: not listed.
Checked USP Verified database on Sep 21, 2026: not listed.
NSF Certified for Sport: checked, not listed
Checked and absent. NSF's whole Certified for Sport directory was read on Oct 17, 2026, 2,581 listings, and holds one MegaFood row, 1730628, its Micronized Creatine Monohydrate Unflavored Powder, and no magnesium row. The label on this package prints no NSF mark. Absence from a database is not a failed test.
Checked and absent. USP's own Verified Products directory was read page by page in a browser on Sep 21, 2026: 16 pages, 159 products, 16 brands, captured in this site's directory snapshot. This brand does not appear in the directory or in its brand facet, and no product in it names this brand. USP verifies the products a company submits to it, so this records which products were submitted and nothing else. Absence from a database is not a failed test.
MegaFood does not appear as a brand in LGC's own Informed Sport product list of October 2026, 497 brands and 1,887 product lines, as read on Oct 3, 2026. Absence from a list is not a failed test: Informed Sport certifies the products a company submits, so this records only that none from this brand is in the program's published list on that date.
MegaFood does not appear as a brand in LGC's own Informed Choice product list of October 2026, 201 brands and 853 product lines, as read on Oct 3, 2026. Absence from a list is not a failed test: Informed Choice certifies the products a company submits, so this records only that none from this brand is in the program's published list on that date.
No laboratory report with figures is recorded here for this product.
Not established: Heavy-metal testing, Label-accuracy testing.
Absence of data is not evidence that a product is clean. It means we found no published result for that testing.
Label
Form
tablet
Serving size
1 tablet
Active ingredient
Magnesium Glycinate: 50mg as labeled
Elemental magnesium as printed on the line's Supplement Facts panel image: "Magnesium (as fermented magnesium bisglycinate) 50 mg 12%" per 1-tablet serving. The panel prints no compound weight, so none is recorded and nothing is derived. It names one salt, fermented magnesium bisglycinate, and no second salt; the product's own name, "Magnesium", names none. The panel prints a serving size and no servings-per-container line; this bottle's own front prints "90 TABLETS | 90 SERVINGS" and the store's variant title is "90 Day | 90ct", so one tablet is one serving and the count is the serving count. The panel's second line is "Organic spinach leaf 50 mg". It is named on this package's row as a second active; the price per dose pays for the 50 mg of magnesium alone, and the marking changes no ranking. The label's CERTIFIED VEGAN and GLUTEN FREE marks are what those two answers rest on.
Second active
organic spinach leaf 50 mg
Printed on the panel, and not counted in the price per dose.
Vegan
Yes
Gluten free
Yes
Allergens
Unknown
Other ingredients
Ferment media (organic brown rice, rice protein, autolyzed yeast extract, yeast [inactive]), Microcrystalline cellulose, Stearic acid, Hypromellose, Silicon dioxide
Same category and format and, where a category is compared by strength, the same labeled strength. Different recorded ingredient-form lists are kept separate. Ordered by container price before delivery; only fresh recorded prices are shown. Formulas, flavors and allergens may differ: check each label. These are browsing options, not recommended substitutes.
What this rests on: prices we last recorded at the retailer named on each product page, which go stale, and each page says when it was checked; the products we track, not every product sold, and Amazon and Walmart are not among the stores; listings and labels read at the source, each linked from the page. Found an error? Tell us. The full method: How we compare.