Label arithmetic · NIH DSLD 262641
Wonder Laboratories Magnesium: 133 mg of magnesium per tablet, 3 tablets a day (salt not resolved)
133 mg of magnesium per tablet; the label's 3 tablets a day give 399 mg. Salt not resolved from the NIH record. Inside: label lines, ingredients.
Wonder Laboratories Magnesium declares 133 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 262641, label dated 2021-11-19.
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: 32% vs 32%
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 | 133 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 262641 · label 2021-11-19; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Wonder Laboratories Magnesium files 1 magnesium line in NIH DSLD 262641; the selected primary line declares 133 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 |
|---|---|---|
| 133 mg | Salt not named in this row as of 2026-11-02 | Primary serving |
Source · NIH DSLD 262641 · label 2021-11-19; 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 262641 · label 2021-11-19; 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, Wonder Laboratories Magnesium lasts 33 days: 100 servings against 3 servings a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 100 Tablet(s) |
| Serving size as filed | 1 Tablet(s) |
| Servings per container | 100 |
| Servings per day in the directions | 3 |
| Days per bottle | 33 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 262641 · label 2021-11-19; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "32% Daily Value" mean here, and does it recompute?
The label declares 32% Daily Value; 133 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 32%, the same within one point.
computed| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 32% | 420 mg | 32% |
Source · NIH DSLD 262641; 21 CFR 101.9 · label 2021-11-19 · release 2026-08-10-f441aa9f · CSV · method
Why does this label contain magnesium stearate, what shell is it, and who is it filed for?
Wonder Laboratories Magnesium 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.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Vegetable Cellulose |
| 2 | L-Glycine |
| 3 | Vegetable Magnesium Silicate |
| 4 | Stearic Acid |
| 5 | Silica |
| 6 | Vegetable Magnesium Stearate |
| Shell | vegetarian |
| Target group | Adult (18 - 50 Years) |
1 additional rows
| Entry | Filed ingredient or declaration |
|---|---|
| Target group | Gluten Free |
Source · NIH DSLD 262641 · label 2021-11-19; 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?
Wonder Laboratories has 0 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Wonder Laboratories 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?
Same filed formulation as 2 other labels of this brand; no other brand files it as of 2026-11-02.
computed| Label | Brand | Price per 100 mg |
|---|---|---|
| No cross-brand match as of 2026-11-02 |
Source · NIH DSLD 262641 · label 2021-11-19; 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 262641 · label 2021-11-19; 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 262641 (label 2021-11-19, 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; no barcode is filed; 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 262641 |
| Scanned label (PDF) | Label 262641 scan |
| Label date | 2021-11-19 |
| Date entered into DSLD | 2021-11-19 |
| Barcode (UPC) as filed | Not filed as of 2026-11-02 |
| Label version · Package size difference, same product | NIH DSLD 263907 |
| Label version · Package size difference, same product | NIH DSLD 260580 |
| Label version · Package size difference, same product | NIH DSLD 256377 |
27 additional rows
| Field | As filed |
|---|---|
| Label version · Package size difference, same product | NIH DSLD 215403 |
| Label version · Package size difference, same product | NIH DSLD 162688 |
| Label version · Package size difference, same product | NIH DSLD 256376 |
| Label version · Image difference, same product | NIH DSLD 162688 |
| Label version · Image difference, same product | NIH DSLD 215402 |
| Label version · Image difference, same product | NIH DSLD 256376 |
| Label version · Package size difference, same product | NIH DSLD 215402 |
| Distributed by | Wonder Laboratories, White House, TN |
| Claim category as filed | Nutrient |
| Claim category as filed | All Other |
| Claim category as filed | Structure/Function |
| Suggested/Recommended/Usage/Directions | Directions: As a dietary supplement, take 1 tablet three times a day. |
| Precautions re: All Other | Tamper evident: Do not use this product if imprinted foil seal under cap is broken or missing. |
| Formulation re: Other | Mfg. in an FDA Registered Facility using Good Manufacturing Practices (GMPs) |
| Storage | Keep tightly closed. Store at room temperature: 59 degrees - 86 degrees F (15 degrees to 30 degrees C). |
| Precautions re: Children | Keep out of reach of children. |
| Formulation re: Other | Conforms to USP <2091> for weight. Meets USP <2040> disintegration for maximum bioavailability. |
| Precautions re: Pregnant or Nursing or Prescription Medications | Caution: If you are pregnant or nursing, consult your physician before taking this product. |
| 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 | Formula 138 |
| Formula re: Contains | Amino acid Chelated Magnesium |
| Formulation re: Other | Helps regulate Calcium metabolism |
| Formulation re: Does NOT Contain | Gluten free |
| FDA Statement of Identity | Dietary Supplement |
| Formulation re: Other | Made in USA |
| Physical state | Tablet or Pill |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 262641 · label 2021-11-19; 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.