Label arithmetic · NIH DSLD 1237
Vitamin World Potassium Magnesium Aspartate: 50 mg of magnesium per tablet, 1 tablet a day
50 mg of magnesium per tablet, 1 a day. No US price matched (Nov 2). Inside: salt weight, %DV check.
Vitamin World Potassium Magnesium Aspartate declares 50 mg of elemental magnesium per serving as aspartate, which means 320–668 mg of magnesium aspartate pressed into 1 tablet, 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; 3 of the 25 aspartate labels in this registry have a matched price. NIH DSLD 1237, label dated 2011-10-26.
computed from the filed label
Chart data
| Displayed chart text |
|---|
| gluconate |
| 853 |
| orotate |
| 688 |
| L-threonate |
| 606 |
| taurate |
| 561 |
| lactate |
| 416 |
| glycerophosphate |
| 400 |
| glycinate |
| 355 |
| malate |
| 322 |
| aspartate |
| 320 |
| citrate |
| 309 |
| sulfate |
| 248 |
| chloride |
| 196 |
| carbonate |
| 173 |
| hydroxide |
| 120 |
| oxide |
| 83 |
Data release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-10-19 · chemistry 2026-10-17
Mass: 320–668 mg per tablet · Price: none matched · % DV: 13% vs 12%
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 aspartate is pressed into one tablet?
Vitamin World Potassium Magnesium Aspartate carries 320–668 mg of magnesium aspartate per serving for 50 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 | 50 mg |
| Units per serving | 1 |
| Magnesium aspartate per serving | 320–668 mg |
| Magnesium aspartate per tablet | 320–668 mg |
| Capsule capacity 0 · 00 · 000 | 545 · 730 · 1,100 mg |
| Verdict | Capsule sizes do not apply |
The filed salt can have more than one hydration state (1:1 magnesium aspartate 15.64%; bis(hydrogen aspartate) 8.42%, its dihydrate 7.49%; stoichiometry and hydration unresolved), so the compound mass is a range.
Source · NIH DSLD 1237 · label 2011-10-26; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Vitamin World Potassium Magnesium Aspartate files 1 magnesium line in NIH DSLD 1237; the selected primary line declares 50 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 |
|---|---|---|
| 50 mg | aspartate · Magnesium Note: from 250 mg of Magnesium Aspartate | Primary serving |
Source · NIH DSLD 1237 · label 2011-10-26; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Does this label's aspartate claim hold up, or could the magnesium come from another source?
The label names one magnesium form, aspartate, 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 aspartate | 7.5–15.6% | filed magnesium line |
Source · NIH DSLD 1237 · label 2011-10-26; 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; 3 of 25 aspartate labels have one, against a median of none per 100 mg among 0 ranked aspartate offers.
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 Vitamin World Potassium Magnesium Aspartate as of 2026-11-02: servings per container are not filed.
computed| Measure | Value |
|---|---|
| Net contents as filed | 90 Easy To Swallow Coated Tablet(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 |
| 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 1237 · label 2011-10-26; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "13% Daily Value" mean here, and does it recompute?
The label declares 13% Daily Value; 50 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 12%, the same within one point.
computed| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 13% | 420 mg | 12% |
Source · NIH DSLD 1237; 21 CFR 101.9 · label 2011-10-26 · release 2026-08-10-f441aa9f · CSV · method
Why does this label contain magnesium stearate, what shell is it, and who is it filed for?
Vitamin World Potassium Magnesium Aspartate files 7 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 15 of 25 aspartate labels that list magnesium stearate.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Vegetable Cellulose |
| 2 | Dicalcium Phosphate |
| 3 | Food Glaze |
| 4 | Silica |
| 5 | Stearic Acid |
| 6 | Vegetable Magnesium Stearate |
| 7 | Titanium Dioxide color |
| Shell | vegetarian |
1 additional rows
| Entry | Filed ingredient or declaration |
|---|---|
| Target group | Adult (18 - 50 Years) |
Source · NIH DSLD 1237 · label 2011-10-26; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What has research measured about aspartate, and about side effects?
2 studies in the PubMed-checked registry measured outcomes involving aspartate; none reports a gastrointestinal outcome as of 2026-11-02. They measured the salt, not this label.
measured| Year | Study | PubMed |
|---|---|---|
| 2005 | Study of magnesium bioavailability from ten organic and inorganic Mg salts in Mg-depleted rats using a stable isotope approach | 16548135 |
| 2001 | Bioavailability of US commercial magnesium preparations | 11794633 |
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?
Vitamin World has 0 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Vitamin World 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 1237 · label 2011-10-26; 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 1237 · label 2011-10-26; 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 1237 (label 2011-10-26, snapshot 2026-08-10) and the chemistry model of 2026-09-13. 2 gaps remain: No US retail price matched as of 2026-11-02 (barcode 0 74312 77390 7); 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 1237 |
| Label date | 2011-10-26 |
| Date entered into DSLD | 2011-10-26 |
| Barcode (UPC) as filed | 0 74312 77390 7 |
| Label version · Image difference, same product | NIH DSLD 21024 |
| Carefully Manufactured by | Vitamin World, Inc., Ronkonkoma, NY, U.S.A. |
| Claim category as filed | All Other |
| Claim category as filed | Structure/Function |
12 additional rows
| Field | As filed |
|---|---|
| Brand IP Statement(s) re: (c), (TM), (SM) | (C)2008 Vitamin World, Inc. |
| 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. |
| FDA Statement of Identity | Dietary Supplement |
| Formulation re: Does NOT Contain | No Artificial Flavor or Sweetener, No Sugar, No Milk, No Lactose, No Soy, No Gluten, No Wheat, No Yeast, No Fish. Sodium Free. |
| Precautions re: Pregnant or Nursing or Prescription Medications | WARNING: If you are pregnant, nursing or taking any medications, consult your doctor before use. Discontinue use and consult your doctor if any adverse reactions occur. Keep out of reach of children. Store in a cool, dry place. Do not use if seal under cap is broken or missing. |
| General: Product/Version Code | PROD. #7271 B7272 12E |
| General Statements: All Other Content | Promotes Energy Metabolism & Electrolyte Replacement* |
| General Statements: All Other Content | QUALITY ASSURED This product has been developed, manufactured and packaged by Vitamin World. Our world-class facilities allow us to control exactly what goes into each product. It is your assurance that you are getting the highest quality and freshest products. You have our guarantee! |
| Suggested/Recommended/Usage/Directions | DIRECTIONS: For adults, take one (1) caplet daily, preferably with a meal. |
| General Statements: All Other Content | Get healthy. |
| Physical state | Tablet or Pill |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 1237 · label 2011-10-26; 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.