Label arithmetic · NIH DSLD 309263
Carlson Magnesium 350 mg: 350 mg of magnesium per capsule, 1 capsule a day (salt not resolved)
350 mg of magnesium per capsule, 1 a day. Salt not resolved from the NIH record; no US price matched (Nov 2). Inside: label lines, ingredients.
Carlson Magnesium 350 mg declares 350 mg of elemental magnesium per 1 capsule(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 309263, label dated 2024-05-23.
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: 83% vs 83%
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.
Will 350 mg of magnesium actually fit in one capsule, or do I need more than one?
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. Lower bound, not a measurement: even if all 350 mg of magnesium per serving came from magnesium oxide (60.3% magnesium), the richest magnesium salt used in supplements, because the label names no form, the single capsule would need at least 580 mg of compound, so at this bound it needs at least a size 00 capsule (about 730 mg at 0.8 g/mL); the actual form, which the label does not name, may need more.
computed with assumption| Measure | Value |
|---|---|
| Elemental magnesium per serving | 350 mg |
| Units per serving | 1 |
| Magnesium salt per serving | Not computable as of 2026-11-02 |
| Magnesium salt per capsule | 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 309263 · label 2024-05-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Carlson Magnesium 350 mg files 1 magnesium line in NIH DSLD 309263; the selected primary line declares 350 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 |
|---|---|---|
| 350 mg | Salt not named in this row as of 2026-11-02 | Primary serving |
Source · NIH DSLD 309263 · label 2024-05-23; 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 309263 · label 2024-05-23; 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, Carlson Magnesium 350 mg lasts 180 days: 180 servings against 1 serving a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 180 Capsule(s) |
| Serving size as filed | 1 Capsule(s) |
| Servings per container | 180 |
| Servings per day in the directions | 1 |
| Days per bottle | 180 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 309263 · label 2024-05-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "83% Daily Value" mean here, and does it recompute?
The label declares 83% Daily Value; 350 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 83%, the same within one point.
computed| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 83% | 420 mg | 83% |
Source · NIH DSLD 309263; 21 CFR 101.9 · label 2024-05-23 · release 2026-08-10-f441aa9f · CSV · method
Why does this label contain magnesium stearate, what shell is it, and who is it filed for?
Carlson Magnesium 350 mg files 3 other ingredients, including magnesium stearate (reference fraction 4.1% magnesium; no quantity filed, so it is not added to the total) and a gelatin shell.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Beef Gelatin |
| 2 | Magnesium Stearate |
| 3 | Cellulose |
| Shell | gelatin |
| Target group | Adult (18 - 50 Years) |
| Target group | Gluten Free |
Source · NIH DSLD 309263 · label 2024-05-23; 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?
Carlson has 3 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Carlson 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-2157-2017 | 2017-05-03 | Product contains elevated levels of patulin. | Terminated |
| F-2158-2017 | 2017-05-03 | Product contains elevated levels of patulin. | Terminated |
| F-1253-2023 | 2023-07-26 | Product contains high levels of patulin (above 50ppb). | 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 309263 · label 2024-05-23; 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 309263 · label 2024-05-23; 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 309263 (label 2024-05-23, 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 88395 05222 4); 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 309263 |
| Scanned label (PDF) | Label 309263 scan |
| Label date | 2024-05-23 |
| Date entered into DSLD | 2024-05-23 |
| Barcode (UPC) as filed | 0 88395 05222 4 |
| Label version · Package size difference, same product | NIH DSLD 54664 |
| Label version · Package size difference, same product | NIH DSLD 216341 |
| Label version · Package size difference, same product | NIH DSLD 54666 |
24 additional rows
| Field | As filed |
|---|---|
| Label version · Package size difference, same product | NIH DSLD 216344 |
| Label version · Package size difference, same product | NIH DSLD 306448 |
| Label version · Package size difference, same product | NIH DSLD 304806 |
| Label version · Package size difference, same product | NIH DSLD 337607 |
| Label version · Image difference, same product | NIH DSLD 54666 |
| Label version · Image difference, same product | NIH DSLD 306448 |
| Label version · Image difference, same product | NIH DSLD 216344 |
| Distributed by | Carlson Division of J.R. Carlson Laboratories, Inc., Arlington Heights, IL, USA |
| Claim category as filed | Nutrient |
| Claim category as filed | All Other |
| Claim category as filed | Qualified Health |
| Claim category as filed | Structure/Function |
| FDA Statement of Identity | Dietary Supplement |
| Formulation re: Other | Cardiovascular support Blood pressure Nerve health |
| Brand IP Statement(s) re: (c), (TM), (SM) | Carlson Providing the highest quality nutritional supplements since 1965 |
| Suggested/Recommended/Usage/Directions | Directions: Adults: Take one capsule daily at mealtime. |
| Storage | Keep bottle tightly closed. Store away from heat and moisture. |
| Formulation re: Does NOT Contain | Gluten-free No artificial preservatives |
| FDA Disclaimer Statement | These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease. |
| Formula re: Contains | Magnesium is an essential mineral, important for many vital body functions. Consuming diets with adequate magnesium may reduce the risk of high blood pressure (hypertension). However, the FDA has concluded that the evidence is inconsistent and inconclusive. |
| Formulation re: Other | Potency & quality guaranteed An FDA regulated facility |
| General Statements: All Other Content | IMPACT Collective Reduced plastic impact |
| Physical state | Capsule |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 309263 · label 2024-05-23; 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.