Label arithmetic · NIH DSLD 36326
Thompson Magnesium 100 mg: 100 mg of magnesium per tablet, 4 tablets a day – gluconate + oxide
100 mg of magnesium per tablet; the label's 4 tablets a day give 400 mg. From gluconate + oxide. Inside: label lines, ingredients.
Thompson Magnesium 100 mg declares 400 mg of elemental magnesium per 4 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 36326, label dated 2014-08-26.
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: 100% vs 95%
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 | 400 mg |
| Units per serving | 4 |
| 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 36326 · label 2014-08-26; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Thompson Magnesium 100 mg files 1 magnesium line in NIH DSLD 36326; the selected primary line declares 400 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 |
|---|---|---|
| 400 mg | gluconate, oxide · Magnesium (Form: as Magnesium Oxide, and Magnesium Gluconate) | Primary serving |
Source · NIH DSLD 36326 · label 2014-08-26; 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?
The label names 2 magnesium forms (gluconate, oxide); a named blend does not establish how much magnesium each form contributes, so the resolved reading is the most favourable one, compared with oxide, the salt richest in magnesium at 60.3%.
computed with assumption| Form named on the label | Elemental fraction | Source |
|---|---|---|
| Magnesium gluconate | 5.9% | named on label |
| Magnesium oxide | 60.3% | named on label |
Source · NIH DSLD 36326 · label 2014-08-26; 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, Thompson Magnesium 100 mg lasts 30 days: 30 servings against 1 serving a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 120 Tablet(s) |
| Serving size as filed | 4 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 36326 · label 2014-08-26; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "100% Daily Value" mean here, and does it recompute?
The label declares 100% Daily Value; 400 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 95%, a difference of 5 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 |
| 95 · 100 |
| Declared vs |
| recomputed % DV |
| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 100% | 420 mg | 95% |
Source · NIH DSLD 36326; 21 CFR 101.9 · label 2014-08-26 · 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?
Thompson Magnesium 100 mg files 3 other ingredients and a vegetarian shell.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Cellulose |
| 2 | Stearic Acid |
| 3 | Silica |
| Shell | vegetarian |
| Target group | Adult (18 - 50 Years) |
Source · NIH DSLD 36326 · label 2014-08-26; 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?
Thompson has 6 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Thompson 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-0814-2018 | 2018-02-14 | The seasoning mix Nutrition label states that the sodium content is 0 mg, when it actually contains 350 mg of salt per serving. | Terminated |
| F-0667-2021 | 2021-06-23 | Potential Salmonella contamination | Terminated |
| F-0459-2025 | 2025-02-12 | Barbeque sauce product contains undeclared allergen listing of (Milk) in product ingredient listing from sub-ingredient Butter. | Terminated |
| F-0460-2025 | 2025-02-12 | Barbeque sauce product contains undeclared listing of (Milk) in product ingredient listing from sub-ingredient Butter. | Terminated |
| F-0458-2025 | 2025-02-12 | Barbeque sauce product contains undeclared allergens (soy) contained in sub-ingredient | 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 36326 · label 2014-08-26; 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 36326 · label 2014-08-26; 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 36326 (label 2014-08-26, 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 31515 19155 8); 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 36326 |
| Label date | 2014-08-26 |
| Date entered into DSLD | 2014-08-26 |
| Barcode (UPC) as filed | 0 31515 19155 8 |
| Mfd. by | NutraPure, Inc. |
| Comments or Questions | Thompson, Phoenix, AZ, USA |
| Claim category as filed | All Other |
| General Statements: All Other Content | SINCE 1932 |
14 additional rows
| Field | As filed |
|---|---|
| General Statements: All Other Content | ESSENTIAL MINERAL |
| General Statements: All Other Content | FRESH HEALTHY |
| FDA Statement of Identity | DIETARY SUPPLEMENT |
| Precautions re: All Other | WARNING: Do not use if safety seal is broken or missing. |
| Precautions re: Children | Keep out of reach of children. |
| General Statements: All Other Content | Keep your licensed health care practitioner informed when using this product. |
| Suggested/Recommended/Usage/Directions | Directions: Use only as directed. Take four tablets daily with food. |
| Storage | Store in a cool, dry place. |
| Brand IP Statement(s) re: (c), (TM), (SM) | Our own laboratory analysis guarantees purity and freshness of all Thompson(R) products. |
| Brand IP Statement(s) re: (c), (TM), (SM) | (C) 2008 |
| General: Product/Version Code | 3487601 1107 |
| General Statements: All Other Content | FOUR DAILY |
| Physical state | Tablet or Pill |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 36326 · label 2014-08-26; 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.