Label arithmetic · NIH DSLD 247159
Moss Nutrition Magnesium Citrate: 120 mg of magnesium per capsule, 1 capsule a day
120 mg of magnesium per capsule, 1 a day. No US price matched (Nov 2). Inside: salt weight, capsule size.
Moss Nutrition Magnesium Citrate declares 120 mg of elemental magnesium per serving as citrate, which needs 743–1,062 mg of magnesium citrate in each capsule, 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: it fits only that size. 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 247159, label dated 2021-03-25.
computed from the filed label
Chart data
| Displayed chart text |
|---|
| 545 mg |
| 730 mg |
| 1,100 mg |
| 743–1,062 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: 743–1,062 mg per capsule · Price: none matched · % DV: 29% vs 29%
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 120 mg of citrate actually fit in one capsule, or do I need more than one?
Estimated salt mass versus assumed capsule capacity: Moss Nutrition Magnesium Citrate implies 743–1,062 mg of magnesium citrate in each capsule to deliver 120 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 000, read at the most favourable hydration and the most units per serving.
computed with assumption| Measure | Value |
|---|---|
| Elemental magnesium per serving | 120 mg |
| Units per serving | 1 |
| Magnesium citrate per serving | 743–1,062 mg |
| Magnesium citrate per capsule | 743–1,062 mg |
| Capsule capacity 0 · 00 · 000 | 545 · 730 · 1,100 mg |
| Verdict | Needs size 000 |
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 247159 · label 2021-03-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Moss Nutrition Magnesium Citrate files 1 magnesium line in NIH DSLD 247159; the selected primary line declares 120 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 |
|---|---|---|
| 120 mg | citrate · Magnesium (Form: as Magnesium Citrate) | Primary serving |
Source · NIH DSLD 247159 · label 2021-03-25; 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 247159 · label 2021-03-25; 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, Moss Nutrition Magnesium Citrate lasts 180 days: 180 servings against 1 serving a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 180 Vegetarian Capsule(s) |
| Serving size as filed | 1 Capsule(s) |
| Servings per container | 180 |
| Servings per day in the directions | 1 |
| Days per bottle | 180 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 247159 · label 2021-03-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "29% Daily Value" mean here, and does it recompute?
The label declares 29% Daily Value; 120 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 29%, the same within one point.
computed| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 29% | 420 mg | 29% |
Source · NIH DSLD 247159; 21 CFR 101.9 · label 2021-03-25 · 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?
Moss Nutrition Magnesium Citrate files 3 other ingredients 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 | Hydroxypropyl Methycellulose |
| 2 | Microcrystalline Cellulose |
| 3 | L-Leucine |
| Shell | vegetarian |
| Target group | Adult (18 - 50 Years) |
| Target group | Gluten Free |
Source · NIH DSLD 247159 · label 2021-03-25; 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?
Moss Nutrition has 0 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Moss Nutrition 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 247159 · label 2021-03-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Which labels are closest to this one, with the same salt and dose?
6 labels use the same resolved citrate within ±10% of this label's 120 mg per unit, compared side by side on price and capsule verdict.
computed| Label | Elemental per unit | Price | Verdict |
|---|---|---|---|
| Moss Nutrition Magnesium Citrate | 120 mg | No price | Needs size 000 |
| Nature Made Magnesium Citrate (DSLD 179947) | 125 mg | $10.89 · 2026-11-02 | Capsule sizes do not apply |
| Nature Made Magnesium Citrate (DSLD 179948) | 125 mg | $10.89 · 2026-11-02 | Capsule sizes do not apply |
| Meijer Magnesium Citrate 250 mg | 125 mg | No price | Capsule sizes do not apply |
| KAL Malic Acid 1500 mg with Magnesium | 125 mg | No price | Capsule sizes do not apply |
| Nature Made Magnesium Citrate 250 mg | 125 mg | No price | Capsule sizes do not apply |
Source · NIH DSLD 247159 · label 2021-03-25; 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 247159 (label 2021-03-25, 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 M131). The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 247159 |
| Label date | 2021-03-25 |
| Date entered into DSLD | 2021-03-25 |
| Barcode (UPC) as filed | M131 |
| Label version · Package size difference, same product | NIH DSLD 188765 |
| Label version · Image difference, same product | NIH DSLD 188765 |
| Label version · Package size difference, same product | NIH DSLD 275538 |
| Label version · Package size difference, same product | NIH DSLD 247156 |
14 additional rows
| Field | As filed |
|---|---|
| Manufactured for | Moss Nutrition Products, Inc., Hadley, MA |
| Claim category as filed | All Other |
| Claim category as filed | Structure/Function |
| Suggested/Recommended/Usage/Directions | Suggested Use: 1 capsule per day, or as directed by your healthcare professional. |
| Precautions re: Pregnant or Nursing or Prescription Medications | Warning: If taking medication, pregnant or nursing consult a physician before using. |
| 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. |
| General Statements: All Other Content | M Professional Supplements Est. 1991 |
| Formulation re: Other | Well Absorbed Essential Mineral |
| FDA Statement of Identity | Dietary Supplement |
| Formulation re: Does NOT Contain | Does not contain gluten. |
| Precautions re: Children | Keep out of reach of children. |
| Storage | Store sealed in a cool, dry place. |
| Physical state | Capsule |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 247159 · label 2021-03-25; 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.