Label arithmetic · NIH DSLD 323568
NuMedica Magnesium Citrate Extra Strength 200 mg: 200 mg of magnesium per capsule, 2–3 capsules a day
200 mg of magnesium per capsule takes 1,238–1,770 mg of citrate; size 000 holds about 1,100 mg (model). Inside: salt weight, capsule size.
Estimated salt mass versus assumed capsule capacity: NuMedica Magnesium Citrate Extra Strength 200 mg implies 1,238–1,770 mg of magnesium citrate per capsule from 200 mg elemental magnesium per serving, above the assumed 1,100 mg capacity of size 000 at powder density 0.8 g/mL, the top of the usual 0.6–0.8 range, calculated 2026-11-02. 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 323568, label dated 2025-02-23.
computed from the filed label
Chart data
| Displayed chart text |
|---|
| 545 mg |
| 730 mg |
| 1,100 mg |
| 1,238–1,770 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: 1,238–1,770 mg per capsule · Price: none matched · % DV: 48% vs 48%
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.
Estimated salt mass versus assumed capsule capacity
Estimated salt mass versus assumed capsule capacity: NuMedica Magnesium Citrate Extra Strength 200 mg implies 1,238–1,770 mg of magnesium citrate in each capsule to deliver 200 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: exceeds size 000, read at the most favourable hydration and the most units per serving.
computed with assumption| Measure | Value |
|---|---|
| Elemental magnesium per serving | 200 mg |
| Units per serving | 1 |
| Magnesium citrate per serving | 1,238–1,770 mg |
| Magnesium citrate per capsule | 1,238–1,770 mg |
| Capsule capacity 0 · 00 · 000 | 545 · 730 · 1,100 mg |
| Verdict | Exceeds 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 323568 · label 2025-02-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
NuMedica Magnesium Citrate Extra Strength 200 mg files 1 magnesium line in NIH DSLD 323568; the selected primary line declares 200 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 |
|---|---|---|
| 200 mg | Salt not named in this row; magnesium citrate is taken from the label text | Primary serving |
Source · NIH DSLD 323568 · label 2025-02-23; 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?
For this declaration to fit one size 000 capsule, at least 15% of the magnesium would have to come from a salt richer in magnesium, such as magnesium oxide (computed at powder density 0.8 g/mL, the top of the usual 0.6–0.8 range), 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% | full NIH DSLD record text |
Source · NIH DSLD 323568 · label 2025-02-23; 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, NuMedica Magnesium Citrate Extra Strength 200 mg lasts 40–60 days: 120 servings against 2–3 servings a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 120 Vegetable Capsule(s) |
| Serving size as filed | 1 Capsule(s) |
| Servings per container | 120 |
| Servings per day in the directions | 2–3 |
| Days per bottle | 40–60 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 323568 · label 2025-02-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "48% Daily Value" mean here, and does it recompute?
The label declares 48% Daily Value; 200 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 48%, the same within one point.
computed| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 48% | 420 mg | 48% |
Source · NIH DSLD 323568; 21 CFR 101.9 · label 2025-02-23 · 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?
NuMedica Magnesium Citrate Extra Strength 200 mg 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 | Hydroxypropylmethylcellulose |
| 2 | Microcrystalline Cellulose |
| 3 | L-Leucine |
| Shell | vegetarian |
| Target group | Vegetarian |
| Target group | Adult (18 - 50 Years) |
| Target group | Gluten Free |
| Target group | Dairy Free |
Source · NIH DSLD 323568 · label 2025-02-23; 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?
NuMedica has 0 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. NuMedica 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 323568 · label 2025-02-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Which labels are closest to this one, with the same salt and dose?
6 labels use the same resolved citrate within ±10% of this label's 200 mg per unit, compared side by side on price and capsule verdict.
computed| Label | Elemental per unit | Price | Verdict |
|---|---|---|---|
| Vitabase Magnesium Citrate 200 mg | 200 mg | No price | Capsule sizes do not apply |
| The Vitamin Shoppe Magnesium Citrate 200 mg (DSLD 55722) | 200 mg | No price | Capsule sizes do not apply |
| Vitamin World Magnesium Citrate 200 mg | 200 mg | No price | Capsule sizes do not apply |
| Protocol For Life Balance Magnesium Citrate | 200 mg | No price | Capsule sizes do not apply |
| The Vitamin Shoppe Magnesium Citrate 200 mg (DSLD 204430) | 200 mg | No price | Capsule sizes do not apply |
| The Vitamin Shoppe Magnesium Citrate 200 mg (DSLD 204431) | 200 mg | No price | Capsule sizes do not apply |
Source · NIH DSLD 323568 · label 2025-02-23; 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 323568 (label 2025-02-23, 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 8 12527 01128 1). The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 323568 |
| Scanned label (PDF) | Label 323568 scan |
| Label date | 2025-02-23 |
| Date entered into DSLD | 2025-02-23 |
| Barcode (UPC) as filed | 8 12527 01128 1 |
| Label version · Image difference, same product | NIH DSLD 213576 |
| Label version · Image difference, same product | NIH DSLD 180012 |
| Manufactured for | NuMedica LLC, Tulsa, OK |
19 additional rows
| Field | As filed |
|---|---|
| Claim category as filed | Nutrient |
| Claim category as filed | All Other |
| Claim category as filed | Structure/Function |
| Suggested/Recommended/Usage/Directions | Directions: Take one capsule 2-3 times per day with meals or as directed by your healthcare practitioner. |
| Formula re: Contains | Magnesium Citrate plays key roles in the activation of amino acids for protein biosynthesis and is highly concentrated in intracellular fluid and bone. It is essential for energy production and metabolism. Magnesium Citrate supports normal muscle contraction and relaxation responses during rest or vigorous activity. It may also help in the prevention of nocturnal leg muscle cramps and support healthy bone structure. |
| 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. |
| Precautions re: Children | Caution: Keep out of reach of children. |
| Storage | Storage: Keep tightly closed in a cool, dry place. |
| Formulation re: Does NOT Contain | Does not contain: Milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, soy. |
| Formulation re: Other | This Formula Meets or Exceeds cGMP Quality Standards. |
| Formulation re: Does NOT Contain | Sourced from non-GMO ingredients. |
| Brand IP Statement(s) re: (c), (TM), (SM) | NuMedica Advancing Nutrition |
| Formulation re: Other | Professional Quality Formulas |
| FDA Statement of Identity | Dietary Supplement |
| Formulation re: Other | Bone & Muscle Support |
| Formulation re: Does NOT Contain | GF Gluten-Free |
| Formulation re: Vegetarian/Vegan | Vegetarian |
| Physical state | Capsule |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 323568 · label 2025-02-23; 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.