Label arithmetic · NIH DSLD 239524
Rexall Calcium, Magnesium and Zinc: 133 mg of magnesium per 1 caplet
133 mg of magnesium in each 1 caplet, about 0 servings per 60 Caplet. From gluconate + oxide. Inside: label lines, ingredients.
Rexall Calcium, Magnesium and Zinc declares 133 mg of elemental magnesium per 1 caplet(s); the magnesium salt is not resolved from the filed record, servings per container are not filed, 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 239524, label dated 2020-11-21.
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 in one serving?
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 serving | 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 239524 · label 2020-11-21; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Rexall Calcium, Magnesium and Zinc files 1 magnesium line in NIH DSLD 239524; 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 | gluconate, oxide · Magnesium (Form: as Magnesium Oxide, and Magnesium Gluconate) | Primary serving |
Source · NIH DSLD 239524 · label 2020-11-21; 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 239524 · label 2020-11-21; 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?
Days per bottle cannot be computed for Rexall Calcium, Magnesium and Zinc as of 2026-11-02: servings per container are not filed.
computed| Measure | Value |
|---|---|
| Net contents as filed | 60 Caplet(s) |
| Serving size as filed | 1 Caplet(s) |
| Servings per container | Not filed as of 2026-11-02 |
| Servings per day in the directions | 1–3 |
| Days per bottle | Not computable as of 2026-11-02 |
| $ 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 239524 · label 2020-11-21; 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 239524; 21 CFR 101.9 · label 2020-11-21 · 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?
Rexall Calcium, Magnesium and Zinc files 4 other ingredients and a vegetarian shell.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Cellulose |
| 2 | Croscarmellose |
| 3 | Cellulose Coating |
| 4 | Contains Less Than 2% of |
| Shell | vegetarian |
| Target group | Adult (18 - 50 Years) |
| Target group | Gluten Free |
| Target group | Dairy Free |
1 additional rows
| Entry | Filed ingredient or declaration |
|---|---|
| Target group | Sugar Free |
Source · NIH DSLD 239524 · label 2020-11-21; 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?
Rexall has 0 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Rexall 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 |
|---|---|---|---|
| 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 239524 · label 2020-11-21; 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 239524 · label 2020-11-21; 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 239524 (label 2020-11-21, snapshot 2026-08-10) and the chemistry model of 2026-09-13. 4 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 3 01220 74251 1); A single salt with a defined elemental fraction is unresolved as of 2026-11-02; Servings per container are not filed as of 2026-11-02. The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 239524 |
| Label date | 2020-11-21 |
| Date entered into DSLD | 2020-11-21 |
| Barcode (UPC) as filed | 3 01220 74251 1 |
| Label version · Image difference, same product | NIH DSLD 63751 |
| Manufactured for | Dolgencorp, LLC, Goodlettsville, TN, USA |
| Claim category as filed | Nutrient |
| Claim category as filed | All Other |
20 additional rows
| Field | As filed |
|---|---|
| Claim category as filed | Structure/Function |
| Formula re: Contains | Important facts you should know These essential minerals are necessary for the proper functioning of the body. Calcium is vital for bones, Magnesium assists nerve and muscle function and Zinc is involved in immune system health. |
| 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. |
| Precautions re: Pregnant or Nursing or Prescription Medications | Warning: If you are pregnant, nursing, taking any medications or have any medical condition, consult your doctor before use. |
| Precautions re: All Other | Discontinue use and consult your doctor if any adverse reactions occur. |
| Precautions re: Children | Keep out of reach of children. |
| Storage | Store at room temperature and avoid excessive heat. |
| Precautions re: All Other | Tamper resistant: Do not use if seal under cap is broken or missing. |
| Brand IP Statement(s) re: (c), (TM), (SM) | Since 1903 Rexall is a registered trademark of Rexall Sundown, Inc. |
| Brand IP Statement(s) re: (c), (TM), (SM) | 2017 |
| General Statements: All Other Content | Since 1903 Rexall |
| Formulation re: Other | Bone and immune system health |
| FDA Statement of Identity | Dietary Supplement |
| General Statements: All Other Content | 100% Satisfaction Guaranteed |
| Suggested/Recommended/Usage/Directions | Directions: For adults, take one (1) caplet one to three times daily, preferably with meals. |
| Precautions re: Pregnant or Nursing or Prescription Medications | As a reminder, discuss the supplements and medications you take with your health care providers. |
| Formulation re: Does NOT Contain | No gluten, no yeast, no wheat, no milk or milk derivatives, no lactose, no sugar, no preservatives, no soy, no artificial flavor, no sodium. |
| General Statements: All Other Content | N |
| Physical state | Other (e.g. tea bag) |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 239524 · label 2020-11-21; 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.