Label arithmetic · NIH DSLD 177978
MegaFood Magnesium: 50 mg of magnesium per tablet, 1 tablet a day (salt not resolved)
50 mg of magnesium per tablet, 1 a day. Salt not resolved from the NIH record; no US price matched (Nov 2). Inside: label lines, ingredients.
MegaFood Magnesium declares 50 mg of elemental magnesium per 1 tablet(s); the magnesium salt is not resolved from the filed record, Single-salt capacity audit excluded as of 2026-10-17: one salt with a defined elemental fraction is not resolved., as of 2026-11-02. No US retail price matched as of 2026-11-02. NIH DSLD 177978, label dated 2018-08-31.
as filedData release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-10-19 · chemistry 2026-10-17
Mass: not computable · Price: none matched · % DV: 12% vs 12%
Elemental: The magnesium itself; the rest of the compound weight is the partner molecule.
Compound: The whole salt, such as magnesium glycinate, that must physically fit in the capsule.
Size 000: The largest standard capsule, about 1,100 mg of powder at 0.8 g/mL, the top of the usual 0.6–0.8 range; size 00 holds about 730 mg and size 0 about 545 mg.
Recompute with your price
Enter the price you paid; the declared amount and servings of this label are prefilled, so the result is the cost per 100 mg of elemental magnesium for your bottle.
Same-salt comparison appears here.
How much magnesium compound is pressed into one tablet?
The compound mass behind this label cannot be computed as of 2026-11-02: Single-salt capacity audit excluded as of 2026-10-17: one salt with a defined elemental fraction is not resolved.. The filed amounts are listed in the next block.
computed with assumption| Measure | Value |
|---|---|
| Elemental magnesium per serving | 50 mg |
| Units per serving | 1 |
| Magnesium salt per serving | Not computable as of 2026-11-02 |
| Magnesium salt per tablet | Not computable as of 2026-11-02 |
| Capsule capacity 0 · 00 · 000 | 545 · 730 · 1,100 mg |
| Verdict | Not computable as of 2026-11-02 |
Source · NIH DSLD 177978 · label 2018-08-31; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
MegaFood Magnesium files 1 magnesium line in NIH DSLD 177978; the selected primary line declares 50 mg of elemental magnesium per serving, against 0 other rows excluded from the primary amount. A salt named under another nutrient does not turn that nutrient's quantity into elemental magnesium.
measured| Filed amount | Salt or note as filed | Role |
|---|---|---|
| 50 mg | Magnesium (Form: mineral bound S. cerevisiae Genus: S. Species: cerevisiae) | Primary serving |
Source · NIH DSLD 177978 · label 2018-08-31; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Does this label's magnesium claim hold up, or could the magnesium come from another source?
No single magnesium salt is resolved from the filed record as of 2026-11-02, so the source of the declared magnesium cannot be checked against capsule capacity, compared with oxide, the salt richest in magnesium at 60.3%.
computed with assumption| Form named on the label | Elemental fraction | Source |
|---|---|---|
| No form named as of 2026-11-02 | No defined fraction | named on label |
Source · NIH DSLD 177978 · label 2018-08-31; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Is this a good price for the elemental magnesium I'm actually getting?
No US retail price is matched to this label as of 2026-11-02, and without a resolved salt there is no same-salt comparison.
computed| Rank | Label | Per 100 mg | Observed |
|---|
Source · Amazon via licensed data provider; NIH DSLD · unique ASIN × date; prices observed 2026-10-26 to 2026-11-02 · release 2026-08-10-f441aa9f · CSV · method
How many days will this bottle last at the label's own serving, and what does a day cost?
At the label's own serving, MegaFood Magnesium lasts 90 days: 90 servings against 1 serving a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 90 Tablet(s) |
| Serving size as filed | 1 Tablet(s) |
| Servings per container | 90 |
| Servings per day in the directions | 1 |
| Days per bottle | 90 days |
| $ per 30 days at one label serving a day | No ranked price as of 2026-11-02 |
| $ per 30 days at 420 mg Daily Value | No ranked price as of 2026-11-02 |
Source · NIH DSLD 177978 · label 2018-08-31; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "12% Daily Value" mean here, and does it recompute?
The label declares 12% Daily Value; 50 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 12%, the same within one point.
computed| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 12% | 420 mg | 12% |
Source · NIH DSLD 177978; 21 CFR 101.9 · label 2018-08-31 · release 2026-08-10-f441aa9f · CSV · method
Why does this label contain these other ingredients, what shell is it, and who is it filed for?
MegaFood Magnesium files 2 other ingredients and a vegetarian shell.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Cellulose |
| 2 | Stearic Acid |
| Shell | vegetarian |
| Target group | Vegan |
| Target group | Vegetarian |
| Target group | Adult (18 - 50 Years) |
| Target group | Kosher |
| Target group | Gluten Free |
1 additional rows
| Entry | Filed ingredient or declaration |
|---|---|
| Target group | Dairy Free |
Source · NIH DSLD 177978 · label 2018-08-31; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What has research measured about this form, and about side effects?
No study in the registry measured an unresolved salt as of 2026-11-02.
measured| Year | Study | PubMed |
|---|
Source · PubMed-checked study registry · registry checked 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Has this brand had FDA recalls or adverse event reports?
MegaFood has 4 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. MegaFood has FDA CAERS adverse event reports on record at brand level, as do 143 of 273 brands in this registry; openFDA states that “there is no certainty that the reported event (adverse event) was actually due to the product” and that reports “cannot be used to estimate the incidence of these events.”
measured| Recall | Date | Reason | Status |
|---|---|---|---|
| F-1133-2014 | 2014-01-01 | Potential for Chloramphenicol contamination. | Terminated |
| F-1134-2014 | 2014-01-01 | Potential for Chloramphenicol contamination. | Terminated |
| F-1132-2014 | 2014-01-01 | Potential for Chloramphenicol contamination. | Terminated |
| F-1362-2016 | 2016-05-25 | Multi Vitamin label fails to have required warning statement for iron and child resistant cap | Terminated |
Source · openFDA enforcement and CAERS · queried 2026-10-19 · release 2026-08-10-f441aa9f · CSV · method
Is this the same formula as another brand's, and how do their prices differ?
No other brand files the same formulation (ingredients, shell, units and rounded amount) as of 2026-11-02.
computed| Label | Brand | Price per 100 mg |
|---|---|---|
| No cross-brand match as of 2026-11-02 |
Source · NIH DSLD 177978 · label 2018-08-31; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Which labels are closest to this one, with the same salt and dose?
No other label files the same resolved salt within ±10% of this label's dose per unit as of 2026-11-02.
computed| Label | Elemental per unit | Price | Verdict |
|---|---|---|---|
| No neighbour as of 2026-11-02 |
Source · NIH DSLD 177978 · label 2018-08-31; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Where does this record come from, what is missing, and how do I cite or correct it?
Every value on this page traces to NIH DSLD 177978 (label 2018-08-31, snapshot 2026-08-10) and the chemistry model of 2026-09-13. 3 gaps remain: Single-salt capacity audit excluded as of 2026-10-17: one salt with a defined elemental fraction is not resolved.; No US retail price matched as of 2026-11-02 (barcode 0 51494 10120 9); A single salt with a defined elemental fraction is unresolved as of 2026-11-02. The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 177978 |
| Label date | 2018-08-31 |
| Date entered into DSLD | 2018-08-31 |
| Barcode (UPC) as filed | 0 51494 10120 9 |
| Label version · Package size difference, same product | NIH DSLD 43364 |
| Label version · Package size difference, same product | NIH DSLD 62020 |
| Label version · Image difference, same product | NIH DSLD 43364 |
| Label version · Image difference, same product | NIH DSLD 62020 |
31 additional rows
| Field | As filed |
|---|---|
| Label version · Image difference, same product | NIH DSLD 299930 |
| Label version · Image difference, same product | NIH DSLD 327566 |
| Label version · Package size difference, same product | NIH DSLD 327566 |
| Label version · Package size difference, same product | NIH DSLD 287375 |
| Label version · Package size difference, same product | NIH DSLD 265416 |
| Label version · Image difference, same product | NIH DSLD 265416 |
| Label version · Package size difference, same product | NIH DSLD 43407 |
| Label version · Package size difference, same product | NIH DSLD 62564 |
| Label version · Package size difference, same product | NIH DSLD 2525 |
| Label version · Package size difference, same product | NIH DSLD 177958 |
| Label version · Package size difference, same product | NIH DSLD 265195 |
| Made with love by | MegaFood, Manchester, NH |
| Claim category as filed | All Other |
| Claim category as filed | Structure/Function |
| Seals/Symbols | Non GMO Project verified nongmoproject.org NSF Certified Gluten-free Certified vegan Vegan.org Tested free Pesticides & herbicides Soy free Dairy free Farm fresh OK |
| Formulation re: Does NOT Contain | Non GMO NSF Certified Gluten-free Tested free Pesticides & herbicides Soy free Dairy free |
| Formulation re: Vegetarian/Vegan | Certified vegan Vegan.org |
| Formula re: Kosher | OK |
| Brand IP Statement(s) re: (c), (TM), (SM) | Fresh from farm to tablet |
| General Statements: All Other Content | Helps maintain nerve & muscle function |
| General Statements: All Other Content | 90 servings |
| FDA Statement of Identity | Mineral Dietary Supplent |
| Suggested/Recommended/Usage/Directions | Suggested Use: 1 tablet daily. May be taken anytime throughout the day, even on an empty stomach. |
| General Statements: All Other Content | This MegaFood product is made with real food and added nutrients. |
| Formula re: Contains | Each mineral is paired with wholesome nutritional yeast using a unique process to deliver guaranteed potency and the benefit of health-promoting compounds present in the whole food itself. |
| General Statements: All Other Content | See how they're made at megafood.com/showme. Satisfaction guaranteed or your money back. |
| FDA Disclaimer Statement | This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. |
| General Statements: All Other Content | Please recycle |
| General: Product/Version Code | F1392B Rev: 1 05/17 |
| Physical state | Tablet or Pill |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 177978 · label 2018-08-31; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
6 brand pages linked below contain magnesium labels from the NIH DSLD registry snapshot dated 2026-08-10.