Label arithmetic · NIH DSLD 297544
Premier Research Labs Premier Magnesium Powder: 420 mg of magnesium per 5 gram, 24 servings
420 mg of magnesium in each 5 gram, about 24 servings per 4 Ounce. No US price matched (Nov 2). Inside: label lines, ingredients.
Premier Research Labs Premier Magnesium Powder declares 420 mg of elemental magnesium per 5 gram(s) (2 teaspoons); the magnesium salt is not resolved from the filed record, Single-salt capacity audit excluded as of 2026-10-17: buffered, complex, blend or asporotate wording leaves the composition unresolved., as of 2026-11-02. No US retail price matched as of 2026-11-02. NIH DSLD 297544, label dated 2023-12-14.
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 100%
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 powder is in one scoop?
The compound mass behind this label cannot be computed as of 2026-11-02: Single-salt capacity audit excluded as of 2026-10-17: buffered, complex, blend or asporotate wording leaves the composition unresolved.. The filed amounts are listed in the next block.
computed with assumption| Measure | Value |
|---|---|
| Elemental magnesium per serving | 420 mg |
| Units per serving | Not a discrete unit as of 2026-11-02 |
| 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 297544 · label 2023-12-14; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Premier Research Labs Premier Magnesium Powder files 1 magnesium line in NIH DSLD 297544; the selected primary line declares 420 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 |
|---|---|---|
| 420 mg | Salt not named in this row as of 2026-11-02 | Primary serving |
Source · NIH DSLD 297544 · label 2023-12-14; 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 297544 · label 2023-12-14; 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, Premier Research Labs Premier Magnesium Powder lasts 24 days: 24 servings against 1 serving a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 4 Ounce(s); 124 Gram(s) |
| Serving size as filed | 5 Gram(s) (2 Teaspoons) |
| Servings per container | 24 |
| Servings per day in the directions | 1 |
| Days per bottle | 24 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 297544 · label 2023-12-14; 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; 420 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 100%, the same within one point.
computed| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 100% | 420 mg | 100% |
Source · NIH DSLD 297544; 21 CFR 101.9 · label 2023-12-14 · 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?
Premier Research Labs Premier Magnesium Powder files 3 other ingredients.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Natural Flavors |
| 2 | Fructooligosaccharides |
| 3 | Stevia Extract |
| Target group | Vegan |
| Target group | Vegetarian |
| Target group | Adult (18 - 50 Years) |
| Target group | Dairy Free |
Source · NIH DSLD 297544 · label 2023-12-14; 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?
Premier Research Labs has 2 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Premier Research Labs 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-0592-2015 | 2014-12-10 | Undeclared wheat | Terminated |
| F-1418-2022 | 2022-07-20 | Product spoiling over time; spoilage visible beneath lid/closure upon opening. | 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 297544 · label 2023-12-14; 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 297544 · label 2023-12-14; 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 297544 (label 2023-12-14, 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: buffered, complex, blend or asporotate wording leaves the composition unresolved.; No US retail price matched as of 2026-11-02 (barcode 8 07735 01145 1); 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 297544 |
| Scanned label (PDF) | Label 297544 scan |
| Label date | 2023-12-14 |
| Date entered into DSLD | 2023-12-14 |
| Barcode (UPC) as filed | 8 07735 01145 1 |
| Label version · Image difference, same product | NIH DSLD 219657 |
| Manufacturer | Premier Research Labs |
| Claim category as filed | Nutrient |
18 additional rows
| Field | As filed |
|---|---|
| Claim category as filed | All Other |
| Claim category as filed | Structure/Function |
| Suggested/Recommended/Usage/Directions | Suggested use: Take one serving daily or as directed by a health professional. Mix two teaspoons in water or juice and stir well. This powder dissolves best in warm water. In cold water, it may not dissolve completely. |
| Formula re: Contains | Features highly absorbable magnesium with a refreshing watermelon flavor Magnesium is an important co-factor in more than 300 enzyme systems that regulate biochemistry |
| Formulation re: Other | Supports healthy heart, bones, teeth pH balance Helps the utilization of B complex vitamins and vitamins A & C |
| Precautions re: Children | Keep out of reach of children. |
| 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. |
| FDA Statement of Identity | Dietary Supplement |
| Formulation re: Other | PRL's quality guarantee Purity verified Potency verified Composition verified Identity by ICP FDA-Monitored cGMP facility |
| Formulation re: Does NOT Contain | No added magnesium stearate Forensic tested for adulterants Heavy metal tested Manufactured to avoid: added magnesium stearate (an undesirable excipient), artificial colors, artificial flavors or artificial preservatives. |
| Formulation re: Other | PRL's quality program. Manufactured in a cGMP compliant facility for superior quality assurance |
| Precautions re: All Other | Tamper seal: Use only if seal is intact. |
| Precautions re: Pregnant or Nursing or Prescription Medications | Consult your health care practitioner if you are pregnant/nursing, taking medications or have a medical condition, before taking this or any other product. |
| Storage | Store in a cool, dry place. |
| Formulation re: Vegetarian/Vegan | Pure vegan |
| General Statements: All Other Content | Servings per container about 24 |
| Physical state | Powder |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 297544 · label 2023-12-14; 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.