DeliveredDose

MegaFood Extra Strength Magnesium Glycinate (120 capsules)

D · None located
$17.99 at MegaFood (direct) · $0.343 per 200mg
Delivery extra; amount not published
Also contains, not counted in the price per dose: BioPerine black pepper fruit extract (95% piperine) (Piper nigrum) 5 mg.
Buy at MegaFood (direct)

Label read Oct 20, 2026. Where the data comes from

How much does magnesium cost per dose? · Is MegaFood third party tested? · Which magnesium brands are third-party tested?

Comparing with a package we do not list? Cost per dose calculator

Cost

$0.343
per 200mg elemental magnesium
$17.99
per container · MegaFood (direct)
$10.28
for thirty doses of 200mg elemental magnesium, before delivery

Also contains BioPerine black pepper fruit extract (95% piperine) (Piper nigrum) 5 mg. The price per dose counts elemental magnesium only.

Amount per serving
350mg 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 350mg, exactly that level on its own. This upper intake level is for elemental magnesium only. It does not cover BioPerine black pepper fruit extract (95% piperine) (Piper nigrum) 5 mg, which the label also prints.
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.
Servings per container
30
Units needed per dose
2.29 capsules
Doses per container
52.5
Cost per serving
$0.60
In whole units
3 capsules = 263mg for $0.45
This is the fewest whole capsules that hold at least one comparison dose (200mg elemental magnesium). It is shown for information only. Rankings do not use it, because rounding up changes the amount you get as well as the price.
  • One comparison dose is 2.29 capsules, and capsules cannot be split. The smallest whole number that holds at least the 200 mg comparison dose is 3 capsules, which hold 263 mg.
  • Elemental magnesium as printed on this package's own Supplement Facts panel image ("Servings per container 30"): "Magnesium (as 3,000 mg magnesium glycinate) 350 mg 83%" per 4-capsule serving. The 3,000 mg beside it is the compound weight, recorded separately and never used to derive the elemental figure. The panel names one salt and no second salt. 30 servings of four capsules is the "120 CAPSULES | 30 SERVINGS" the bottle front prints. The panel's second line is "BioPerine® black pepper fruit extract (95% piperine) (Piper nigrum) 5 mg". It is named on this package's row as a second active; the price per dose pays for the 350 mg of magnesium alone, and the marking changes no ranking. The label's VEGETARIAN and GLUTEN FREE seals are what those two answers rest on.

Delivery

Delivery cost
Applies, amount not published
Delivery is NOT free on this order. It is $32.02 short of free delivery (orders over $50.00). This retailer does not publish one fixed delivery rate, so we cannot tell you exactly what delivery 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. Read again on October 30, 2026 with the same terms.
Cost per dose delivered
at least $0.343
We will not put a number on this. The product price is the least you could pay, not what you will pay. To know the delivered cost in advance, reach the free-delivery threshold or choose a retailer that publishes its rate.
To get free delivery
Spend $32.02 more at MegaFood (direct)
Delivery policy: MegaFood, MegaFood shipping policy, re-read October 30, 2026 · checked Oct 30, 2026
Buying more than one? Calculate the order

Change the quantity to see the actual container subtotal and whether it reaches the recorded free-delivery threshold.

Container subtotal
$17.99
Delivery
Unknown
At least, before delivery & tax
$17.99
Per 200mg elemental magnesium, before delivery
$0.343

30 labeled servings in this order. Comparison doses are a price yardstick, not advice about how much to take.

Delivery is extra. The retailer has not published a rate we can apply.

Unit price checked Nov 13, 2026.
View this package at MegaFood (direct) →

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.

Delivery policy: MegaFood, MegaFood shipping policy, re-read October 30, 2026 · checked Oct 30, 2026
Delivery terms and limits

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. Read again on October 30, 2026 with the same terms.

Where to buy

MegaFood (direct) · lowest recorded available price
we earn nothing on this link
checked Nov 13, 2026
$17.99Buy

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 retailer with the lowest current price 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: $17.99 at MegaFood (direct), checked . Unchanged since we started checking on Oct 20 (26 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 level 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. The databases we searched, and when, are listed below. If a program is not listed, we did not check it, and we make no claim about it 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.
  • Testing claim we recorded, and where it appeared: "TESTED FOR 150+ PESTICIDES" (seal printed beside the Supplement Facts panel image, naming no program). The claim names no program we grade, so there is no listing to check it against. It does not raise the verification level.
  • 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.
Source: NSF Certified for Sport, NSF Certified for Sport directory, full read, October 17, 2026 · checked Oct 17, 2026
USP Verified: checked, not listed
Checked and absent. We read all 16 pages of USP's own Verified Products directory in a browser on Sep 21, 2026: 159 products from 16 brands. We saved a copy. This brand is not in it: not in the directory's brand filter, and not in any product name. USP verifies the products a company submits to it, so this shows only which products were submitted. Not being listed is not a failed test.
Source: USP, USP Verified Products directory, full read, September 21, 2026 · checked Sep 21, 2026
Informed Sport: checked, not listed
MegaFood is not on the October 2026 Informed Sport product list, which we read on Oct 3, 2026. The list, published by LGC, has 497 brands and 1,887 product lines. Not being listed is not a failed test. Informed Sport certifies what a company submits, so this means only that no product from this brand was on the published list that day.
Source: LGC (Informed Sport), Informed Sport product list, October 2026 PDF, as read October 3, 2026 · checked Oct 3, 2026
Informed Choice: checked, not listed
MegaFood is not on the October 2026 Informed Choice product list, which we read on Oct 3, 2026. The list, published by LGC, has 201 brands and 853 product lines. Not being listed is not a failed test. Informed Choice certifies what a company submits, so this means only that no product from this brand was on the published list that day.
Source: LGC (Informed Choice), Informed Choice product list, October 2026 PDF, as read October 3, 2026 · checked Oct 3, 2026

No laboratory report with figures is recorded here for this product.

Not established: Heavy-metal testing, Label-accuracy testing, Vegan status.
Absence of data is not evidence that a product is clean. It means we found no published result for that testing.

Label

Form
capsule
Serving size
4 capsules
Active ingredient
Magnesium (as magnesium glycinate): 350mg as labeled, from 3,000mg of magnesium glycinate
Elemental magnesium as printed on this package's own Supplement Facts panel image ("Servings per container 30"): "Magnesium (as 3,000 mg magnesium glycinate) 350 mg 83%" per 4-capsule serving. The 3,000 mg beside it is the compound weight, recorded separately and never used to derive the elemental figure. The panel names one salt and no second salt. 30 servings of four capsules is the "120 CAPSULES | 30 SERVINGS" the bottle front prints. The panel's second line is "BioPerine® black pepper fruit extract (95% piperine) (Piper nigrum) 5 mg". It is named on this package's row as a second active; the price per dose pays for the 350 mg of magnesium alone, and the marking changes no ranking. The label's VEGETARIAN and GLUTEN FREE seals are what those two answers rest on.
Second active
BioPerine black pepper fruit extract (95% piperine) (Piper nigrum) 5 mg
Printed on the panel, and not counted in the price per dose.
Vegan
Unknown
Gluten free
Yes
Allergens
Unknown
Other ingredients
Hypromellose (capsule), Microcrystalline cellulose, Silicon dioxide, Stearic acid
Label facts rest on: MegaFood, Supplement Facts panel and bottle front: MegaFood Extra Strength Magnesium Glycinate Capsules, 120 capsules · checked Oct 20, 2026

Other tracked packages

Packages in the same category and format, with the same ingredients. Where we recorded the ingredient forms from the label, only packages with the same forms are shown. Where a category is compared by strength, they also have the same labeled strength. Only current prices are shown, cheapest container first. Prices are before delivery. Formulas, flavors and allergens may differ: check each label. These are browsing options, not recommended substitutes.

Compare all the magnesium glycinate we price, per 200mg elemental magnesium →

What this rests on: Prices are the last ones we recorded at the retailer named on each product page. Prices go stale, so each page says when it was checked. We track some products, not every one sold, and Amazon and Walmart are not among our stores. Listings and labels are read at the source, and each page links to them. Found an error? Tell us. The full method: How we compare.