Label arithmetic · NIH DSLD 249889
Perfect Supplements Perfect Magnesium: 115 mg of magnesium per capsule, 1–3 capsules a day
115 mg of magnesium per capsule; the label's 1–3 capsules a day give 115–346 mg. No US price matched (Nov 2). Inside: salt weight, capsule size.
Perfect Supplements Perfect Magnesium declares 346 mg of elemental magnesium per serving as citrate, which needs 714–1,021 mg of magnesium citrate in each capsule, against 730 mg in a size 00 capsule at powder density 0.8 g/mL, the top of the usual 0.6–0.8 range: it needs size 00 or larger. No US retail price matched as of 2026-11-02; 17 of the 135 citrate labels in this registry have a matched price. NIH DSLD 249889, label dated 2021-06-23.
computed from the filed label
Chart data
| Displayed chart text |
|---|
| 545 mg |
| 730 mg |
| 1,100 mg |
| 714–1,021 mg of citrate per capsule |
Data release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-10-19 · chemistry 2026-10-17
Mass: 714–1,021 mg per capsule · Price: none matched · % DV: 82% vs 82%
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 346 mg of citrate actually fit in one capsule, or do I need more than one?
Estimated salt mass versus assumed capsule capacity: Perfect Supplements Perfect Magnesium implies 714–1,021 mg of magnesium citrate in each capsule to deliver 346 mg of elemental magnesium, against 1,100 mg in the largest standard capsule (size 000) at powder density 0.8 g/mL, the top of the usual 0.6–0.8 range. Verdict: needs size 00, read at the most favourable hydration and the most units per serving.
computed with assumption| Measure | Value |
|---|---|
| Elemental magnesium per serving | 346 mg |
| Units per serving | 1–3 |
| Magnesium citrate per serving | 2,141–3,062 mg |
| Magnesium citrate per capsule | 714–1,021 mg |
| Capsule capacity 0 · 00 · 000 | 545 · 730 · 1,100 mg |
| Verdict | Needs size 00 |
The filed salt can have more than one hydration state (trimagnesium dicitrate 16.2%; dibasic and hydrated forms as low as 11.3%), so the compound mass is a range.
Source · NIH DSLD 249889 · label 2021-06-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Perfect Supplements Perfect Magnesium files 2 magnesium lines in NIH DSLD 249889; the selected primary line declares 346 mg of elemental magnesium per serving, against 1 other row excluded from the primary amount. A salt named under another nutrient does not turn that nutrient's quantity into elemental magnesium.
computed with assumption| Filed amount | Salt or note as filed | Role |
|---|---|---|
| 346 mg | citrate · elemental Magnesium (Form: from Trimagnesium Citrate) | Primary serving |
| 2,025 mg | Salt not named in this row as of 2026-11-02 | Excluded from the primary amount |
If 2,025 mg were the compound mass rather than the element, the elemental amount would be about 327 mg (16.2% of it), computed with a stated assumption.
Source · NIH DSLD 249889 · label 2021-06-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Does this label's citrate claim hold up, or could the magnesium come from another source?
The label names one magnesium form, citrate, resolved from the filed magnesium line; at that salt the declaration is within the assumed size 000 capacity at powder density 0.8 g/mL, compared with oxide, the salt richest in magnesium at 60.3%.
computed with assumption| Form named on the label | Elemental fraction | Source |
|---|---|---|
| Magnesium citrate | 11.3–16.2% | filed magnesium line |
Source · NIH DSLD 249889 · label 2021-06-23; 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; 17 of 135 citrate labels have one, against a median of $0.1159 per 100 mg among 12 ranked citrate offers.
computed
Chart data
| Displayed chart text |
|---|
| n=12 |
| P25 $0.0843 |
| P75 $0.1469 |
| median $0.1159 |
| Rank | Label | Per 100 mg | Observed |
|---|---|---|---|
| 1 | Best Naturals Magnesium Citrate 200 mg | $0.0344 | 2026-11-02 |
| 2 | Solgar Magnesium Citrate | $0.0607 | 2026-11-02 |
| 3 | LES Labs Magnesium Citrate | $0.0777 | 2026-11-02 |
| 4 | Bluebonnet Magnesium Citrate | $0.0865 | 2026-11-02 |
| 5 | Solaray Magnesium Citrate 400 mg | $0.0868 | 2026-11-02 |
| Median | 12 ranked citrate offers | $0.1159 | 2026-11-02 |
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, Perfect Supplements Perfect Magnesium lasts 60 days: 60 servings against 1 serving a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 180 Capsule(s) |
| Serving size as filed | 1–3 Capsule(s) |
| Servings per container | 60 |
| Servings per day in the directions | 1 |
| Days per bottle | 60 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 249889 · label 2021-06-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "82% Daily Value" mean here, and does it recompute?
The label declares 82% Daily Value; 346 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 82%, the same within one point.
computed| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 82% | 420 mg | 82% |
Source · NIH DSLD 249889; 21 CFR 101.9 · label 2021-06-23 · 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?
Perfect Supplements Perfect Magnesium files 1 other ingredient and a vegetarian shell, and no magnesium stearate, against 43 of 135 citrate labels that list magnesium stearate.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Vegetable Capsule |
| Shell | vegetarian |
| Target group | Vegan |
| Target group | Vegetarian |
| Target group | Adult (18 - 50 Years) |
| Target group | Gluten Free |
Source · NIH DSLD 249889 · label 2021-06-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What has research measured about citrate, and about side effects?
10 studies in the PubMed-checked registry measured outcomes involving citrate; 1 mention gastrointestinal or adverse outcomes. They measured the salt, not this label.
measured| Year | Study | PubMed |
|---|---|---|
| 2025 | Comparing the Bioavailability of Two Seawater-Derived Magnesium Preparations. | 40955524 |
| 2024 | Comparative Clinical Study on Magnesium Absorption and Side Effects After Oral Intake of Microencapsulated Magnesium (MAGSHAPE™ Microcapsules) Versus Other Magnesium Sources. | 39770988 |
| 2022 | Effects of short-term magnesium supplementation on ionized, total magnesium and other relevant electrolytes levels. | 35041150 |
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?
Perfect Supplements has 0 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Perfect Supplements 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 |
|---|---|---|---|
| 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 249889 · label 2021-06-23; 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 249889 · label 2021-06-23; 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 249889 (label 2021-06-23, snapshot 2026-08-10) and the chemistry model of 2026-09-13. 1 gap remain: No US retail price matched as of 2026-11-02 (barcode 7 52830 86558 7). The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 249889 |
| Label date | 2021-06-23 |
| Date entered into DSLD | 2021-06-23 |
| Barcode (UPC) as filed | 7 52830 86558 7 |
| Mfg in the USA for | Perfect Supplements, LLC, Florence, MA |
| Claim category as filed | Nutrient |
| Claim category as filed | All Other |
| Claim category as filed | Structure/Function |
20 additional rows
| Field | As filed |
|---|---|
| Formula re: Contains | Perfect magnesium One simple ingredient: 100% pure & natural magnesium citrate |
| Formulation re: Does NOT Contain | Sustainable & ethical: This organic mineral source offers superior bioavailability and no synthetics! |
| Formula re: Contains | Perfect health benefits: Magnesium is critical for enzyme function and energy production. Magnesium is produced through an all natural fermentation process yielding high elemental magnesium content and exceptional solubility. |
| Formulation re: Other | High bioavailability |
| Formula re: Contains | Organic form of Mg |
| 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. |
| Formulation re: Other | All Natural |
| Formulation re: Does NOT Contain | Non-GMO Synthetic free Gluten free |
| Formulation re: Vegetarian/Vegan | Vegan |
| Formula re: Contains | Magnesium Citrate 675 mg each |
| FDA Statement of Identity | Dietary Supplement |
| Suggested/Recommended/Usage/Directions | Suggested use: This is a concentrated form of Magnesium. Some people have a low tolerance for Magnesium. Please start by taking 1 capsule with food and increase gradually to your comfort level, up to 3 capsules per day. |
| Precautions re: All Other | Please note: Comparable to other Magnesium salts, Perfect Magnesium Citrate shows a laxative effect at higher dosage levels. |
| Precautions re: Children | Warning: Keep out of reach of children. |
| Precautions re: Pregnant or Nursing or Prescription Medications | Consult your physician prior to using if you are pregnant or nursing. |
| Formulation re: Other | This product is manufactured in a facility that processes milk, egg, soy, tree nuts, fish, and shellfish. |
| General Statements: All Other Content | BPA free |
| Formulation re: Other | Batch tested |
| Physical state | Capsule |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 249889 · label 2021-06-23; 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.