Label arithmetic · NIH DSLD 217824
tnvitamins Magnesium & Potassium Aspartate: 90 mg of magnesium per tablet, 2 tablets a day – aspartate + oxide
90 mg of magnesium per tablet; the label's 2 tablets a day give 180 mg. From aspartate + oxide. Inside: label lines, ingredients.
tnvitamins Magnesium & Potassium Aspartate declares 180 mg of elemental magnesium per 2 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 217824, label dated 2020-04-23.
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: 45% vs 43%
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 | 180 mg |
| Units per serving | 2 |
| 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 217824 · label 2020-04-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
tnvitamins Magnesium & Potassium Aspartate files 1 magnesium line in NIH DSLD 217824; the selected primary line declares 180 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 |
|---|---|---|
| 180 mg | aspartate, oxide · Magnesium (Form: from Magnesium Aspartate, & Magnesium Oxide) | Primary serving |
Source · NIH DSLD 217824 · label 2020-04-23; 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?
The label names 2 magnesium forms (aspartate, 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 aspartate | 7.5–15.6% | named on label |
| Magnesium oxide | 60.3% | named on label |
Source · NIH DSLD 217824 · label 2020-04-23; 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, tnvitamins Magnesium & Potassium Aspartate lasts 125 days: 125 servings against 1 serving a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 250 Tablet(s) |
| Serving size as filed | 2 Tablet(s) |
| Servings per container | 125 |
| Servings per day in the directions | 1 |
| Days per bottle | 125 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 217824 · label 2020-04-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "45% Daily Value" mean here, and does it recompute?
The label declares 45% Daily Value; 180 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 43%, a difference of 2 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 |
| 43 · 45 |
| Declared vs |
| recomputed % DV |
| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 45% | 420 mg | 43% |
Source · NIH DSLD 217824; 21 CFR 101.9 · label 2020-04-23 · release 2026-08-10-f441aa9f · CSV · method
Why does this label contain magnesium stearate, what shell is it, and who is it filed for?
tnvitamins Magnesium & Potassium Aspartate files 3 other ingredients, including magnesium stearate (reference fraction 4.1% magnesium; no quantity filed, so it is not added to the total).
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Dicalcium Phosphate |
| 2 | Vegetable Magnesium Stearate |
| 3 | Silica |
| Target group | Adult (18 - 50 Years) |
Source · NIH DSLD 217824 · label 2020-04-23; 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?
tnvitamins has 2 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. tnvitamins 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 |
|---|---|---|---|
| H-0942-2026 | 2026-06-17 | Product may be contaminated with Salmonella. | Ongoing |
| H-1185-2026 | 2026-07-29 | Contaminated with Salmonella | Ongoing |
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 217824 · label 2020-04-23; 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 217824 · label 2020-04-23; 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 217824 (label 2020-04-23, 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 95234 19533 2); 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 217824 |
| Label date | 2020-04-23 |
| Date entered into DSLD | 2020-04-23 |
| Barcode (UPC) as filed | 0 95234 19533 2 |
| Laboratory Tested and Manufactured for | TOTAL NUTRITION, INC., FARMINGDALE, NY, USA |
| Claim category as filed | All Other |
| FDA Statement of Identity | Dietary Supplement |
| Suggested/Recommended/Usage/Directions | Directions: As a dietary supplement, for adults, take two (2) capsules daily, preferably with a meal, or as directed by a health care professional. |
7 additional rows
| Field | As filed |
|---|---|
| Precautions re: Pregnant or Nursing or Prescription Medications | Caution: Pregnant or lactating women should consult a doctor before use. |
| Precautions re: All Other | If you are under medical supervision, please consult a doctor before use. Discontinue use and consult a doctor if any adverse reactions occur. |
| Precautions re: Children | Keep out of reach of children. |
| Storage | Store at room temperature. |
| General Statements: All Other Content | Reorder tnvitamins.com 800-645-4446 |
| Physical state | Tablet or Pill |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 217824 · label 2020-04-23; 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.