Label arithmetic · NIH DSLD 72454
Foods Plus Magnesium 400: 240 mg of magnesium per tablet, 2 tablets a day
240 mg of magnesium per tablet; the label's 2 tablets a day give 480 mg. No US price matched (Nov 2). Inside: salt weight, %DV check.
Foods Plus Magnesium 400 declares 480 mg of elemental magnesium per serving as oxide, which means 796 mg of magnesium oxide pressed into 2 tablets, compared with 1,100 mg in the largest standard capsule; capsule verdicts do not apply to a tablet. No US retail price matched as of 2026-11-02; 10 of the 61 oxide labels in this registry have a matched price. NIH DSLD 72454, label dated 2017-04-25.
computed from the filed label
Chart data
| Displayed chart text |
|---|
| gluconate |
| 8,191 |
| orotate |
| 6,602 |
| L-threonate |
| 5,818 |
| taurate |
| 5,381 |
| lactate |
| 3,997 |
| glycerophosphate |
| 3,840 |
| glycinate |
| 3,404 |
| malate |
| 3,089 |
| aspartate |
| 3,069 |
| citrate |
| 2,970 |
| sulfate |
| 2,377 |
| chloride |
| 1,880 |
| carbonate |
| 1,665 |
| hydroxide |
| 1,152 |
| oxide |
| 796 |
Data release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-10-19 · chemistry 2026-10-17
Mass: 398 mg per tablet · Price: none matched · % DV: 120% vs 114%
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 oxide is pressed into one tablet?
Foods Plus Magnesium 400 carries 796 mg of magnesium oxide per serving for 480 mg of elemental magnesium, against 1,100 mg in the largest standard capsule; capsule capacities do not apply to this tablet or pill.
computed with assumption| Measure | Value |
|---|---|
| Elemental magnesium per serving | 480 mg |
| Units per serving | 2 |
| Magnesium oxide per serving | 796 mg |
| Magnesium oxide per tablet | 398 mg |
| Capsule capacity 0 · 00 · 000 | 545 · 730 · 1,100 mg |
| Verdict | Capsule sizes do not apply |
Source · NIH DSLD 72454 · label 2017-04-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Foods Plus Magnesium 400 files 1 magnesium line in NIH DSLD 72454; the selected primary line declares 480 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 |
|---|---|---|
| 480 mg | oxide · Magnesium (Form: as Magnesium Oxide) | Primary serving |
Source · NIH DSLD 72454 · label 2017-04-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Does this label's oxide claim hold up, or could the magnesium come from another source?
The label names one magnesium form, oxide, resolved from the filed magnesium line; capsule capacities do not apply to this form, compared with oxide, the salt richest in magnesium at 60.3%.
computed with assumption| Form named on the label | Elemental fraction | Source |
|---|---|---|
| Magnesium oxide | 60.3% | filed magnesium line |
Source · NIH DSLD 72454 · label 2017-04-25; 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; 10 of 61 oxide labels have one, against a median of $0.0293 per 100 mg among 5 ranked oxide offers.
computed
Chart data
| Displayed chart text |
|---|
| n=5 |
| P25 $0.0258 |
| P75 $0.0356 |
| median $0.0293 |
| Rank | Label | Per 100 mg | Observed |
|---|---|---|---|
| 1 | Nutricost Magnesium Oxide | $0.0148 | 2026-11-02 |
| 2 | tnvitamins Magnesium Oxide 420 mg | $0.0258 | 2026-11-02 |
| 3 | Douglas Laboratories Magnesium Oxide | $0.0293 | 2026-11-02 |
| 4 | Wonder Labs Magnesium Oxide 400 | $0.0356 | 2026-11-02 |
| 5 | Carlson Magnesium Gels 400 mg | $0.0636 | 2026-11-02 |
| Median | 5 ranked oxide offers | $0.0293 | 2026-11-02 |
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, Foods Plus Magnesium 400 lasts 30 days: 30 servings against 1 serving a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 60 Tablet(s) |
| Serving size as filed | 2 Tablet(s) |
| Servings per container | 30 |
| Servings per day in the directions | 1 |
| Days per bottle | 30 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 72454 · label 2017-04-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "120% Daily Value" mean here, and does it recompute?
The label declares 120% Daily Value; 480 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 114%, a difference of 6 points. Labels filed under the earlier 400 mg reference, or with a different filing basis, show gaps of this kind.
computed
Chart data
| Displayed chart text |
|---|
| Declared vs recomputed % |
| DV |
| 114 · 120 |
| Declared vs |
| recomputed % DV |
| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 120% | 420 mg | 114% |
Source · NIH DSLD 72454; 21 CFR 101.9 · label 2017-04-25 · release 2026-08-10-f441aa9f · CSV · method
Why does this label contain magnesium stearate, what shell is it, and who is it filed for?
Foods Plus Magnesium 400 files 6 other ingredients, including magnesium stearate (reference fraction 4.1% magnesium; no quantity filed, so it is not added to the total) and a vegetarian shell, against 30 of 61 oxide labels that list magnesium stearate.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Microcrystalline Cellulose |
| 2 | Croscarmellose Sodium |
| 3 | Stearic Acid |
| 4 | Silica |
| 5 | Magnesium Stearate |
| 6 | Film Coat |
| Shell | vegetarian |
| Target group | Adult (18 - 50 Years) |
3 additional rows
| Entry | Filed ingredient or declaration |
|---|---|
| Target group | Gluten Free |
| Target group | Dairy Free |
| Target group | Sugar Free |
Source · NIH DSLD 72454 · label 2017-04-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What has research measured about oxide, and about side effects?
12 studies in the PubMed-checked registry measured outcomes involving oxide; 2 mention gastrointestinal or adverse outcomes. They measured the salt, not this label.
measured| Year | Study | PubMed |
|---|---|---|
| 2026 | Randomized, open-label study of the short-term pharmacokinetics of oral magnesium oxide in healthy volunteers. | 42091979 |
| 2024 | Comparative Clinical Study on Magnesium Absorption and Side Effects After Oral Intake of Microencapsulated Magnesium (MAGSHAPE™ Microcapsules) Versus Other Magnesium Sources. | 39770988 |
| 2022 | Effects of short-term magnesium supplementation on ionized, total magnesium and other relevant electrolytes levels. | 35041150 |
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?
Foods Plus has 0 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Foods Plus has no FDA CAERS adverse event report on record at brand level as of 2026-10-19 (143 of 273 brands in this registry have at least one CAERS report).
measured| Recall | Date | Reason | Status |
|---|---|---|---|
| No recall record as of 2026-10-19 |
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 72454 · label 2017-04-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Which labels are closest to this one, with the same salt and dose?
6 labels use the same resolved oxide within ±10% of this label's 240 mg per unit, compared side by side on price and capsule verdict.
computed| Label | Elemental per unit | Price | Verdict |
|---|---|---|---|
| Genesis Products Magnesium-Oxide | 241 mg | No price | Capsule sizes do not apply |
| Rising MAGnesium-Oxide | 241 mg | No price | Capsule sizes do not apply |
| Wonder Labs Magnesium Oxide 400 (DSLD 261002) | 241 mg | $21.49 · 2026-11-02 | Capsule sizes do not apply |
| Wonder Labs Magnesium Oxide 400 (DSLD 262919) | 241 mg | $21.49 · 2026-11-02 | Capsule sizes do not apply |
| Wonder Labs Magnesium Oxide 400 (DSLD 316129) | 241 mg | $21.49 · 2026-11-02 | Capsule sizes do not apply |
| Graxcell Pharmaceutical, LLC. Magnesium Oxide 400 mg | 242 mg | No price | Capsule sizes do not apply |
Source · NIH DSLD 72454 · label 2017-04-25; 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 72454 (label 2017-04-25, snapshot 2026-08-10) and the chemistry model of 2026-09-13. 1 gap remain: No US retail price matched as of 2026-11-02 (barcode 7 17284 00603 0). The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 72454 |
| Label date | 2017-04-25 |
| Date entered into DSLD | 2017-04-25 |
| Barcode (UPC) as filed | 7 17284 00603 0 |
| Label version · Image difference, same product | NIH DSLD 46448 |
| Distributed by | Foods Plus, West Caldwell, New Jersey |
| Claim category as filed | All Other |
| Claim category as filed | Structure/Function |
15 additional rows
| Field | As filed |
|---|---|
| Brand IP Statement(s) re: (c), (TM), (SM) | Magox is a registered trademark of Blaine Pharmaceuticals, 1515 Production Drive, Burlington, KY 41005 |
| FDA Disclaimer Statement | These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. |
| Formulation re: Does NOT Contain | No sugar, starch, yeast, artificial colors, flavors or preservatives |
| General Statements: All Other Content | Since 1962 |
| Formulation re: Does NOT Contain | Preservative free Non GMO Gluten-free |
| Brand IP Statement(s) re: (c), (TM), (SM) | Compare to magox |
| FDA Statement of Identity | Dietary Supplement |
| Suggested/Recommended/Usage/Directions | Directions: Take 2 tablets daily with food as a dietary supplement or as directed by a healthcare professional. |
| General Statements: All Other Content | FP #603 |
| Precautions re: Children | Keep out of reach of children. |
| Storage | Protect from heat, light and moisture. Store in a cool, dry place. |
| General Statements: All Other Content | Made in the U.S.A. |
| General Statements: All Other Content | Helps support bone density |
| Physical state | Tablet or Pill |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 72454 · label 2017-04-25; 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.