Label arithmetic · NIH DSLD 303743
XYMOGEN Magnesium Citrate: 100 mg of magnesium per capsule, 1 capsule a day, $9.25 a month
100 mg of magnesium per capsule; the label's 1 capsule a day cost $9.25 a month (Amazon, Nov 2). Inside: salt weight, capsule size, price rank.
XYMOGEN Magnesium Citrate declares 100 mg of elemental magnesium per serving as citrate, which needs 619–885 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. Observed at $0.3083 per 100 mg, rank 12 of 12 ranked citrate offers (1 = lowest price per 100 mg), percentile 100 (lower = lower price). NIH DSLD 303743, label dated 2024-02-22.
computed from the filed label
Chart data
| Displayed chart text |
|---|
| 545 mg |
| 730 mg |
| 1,100 mg |
| 619–885 mg of citrate per capsule |
Data release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-11-02 · chemistry 2026-10-17
Mass: 619–885 mg per capsule · Price: $0.3083 per 100 mg · % DV: 24% vs 24%
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 100 mg of citrate actually fit in one capsule, or do I need more than one?
Estimated salt mass versus assumed capsule capacity: XYMOGEN Magnesium Citrate implies 619–885 mg of magnesium citrate in each capsule to deliver 100 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 | 100 mg |
| Units per serving | 1 |
| Magnesium citrate per serving | 619–885 mg |
| Magnesium citrate per capsule | 619–885 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 303743 · label 2024-02-22; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
XYMOGEN Magnesium Citrate files 1 magnesium line in NIH DSLD 303743; the selected primary line declares 100 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 |
|---|---|---|
| 100 mg | Salt not named in this row; magnesium citrate is taken from the label text | Primary serving |
Source · NIH DSLD 303743 · label 2024-02-22; 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 full NIH DSLD record text; 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% | full NIH DSLD record text |
Source · NIH DSLD 303743 · label 2024-02-22; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Is this a good price for the elemental magnesium I'm actually getting?
XYMOGEN Magnesium Citrate costs $0.3083 per 100 mg of elemental magnesium at the price observed 2026-11-02, rank 12 of 12 ranked citrate offers (1 = lowest price per 100 mg), percentile 100 (lower = lower price), against a same-salt median of $0.1159; prices observed 2026-10-26 to 2026-11-02. First observed 2026-10-26 at $36.99, latest 2026-11-02 at $36.99, 2 observations.
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 |
| 12 | XYMOGEN Magnesium Citrate (this label) | $0.3083 | 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, XYMOGEN Magnesium Citrate lasts 120 days: 120 servings against 1 serving a day in the filed directions. $9.25 a month at the label's suggested use (1 capsule a day) and $38.85 at the 420 mg Daily Value reference (21 CFR 101.9); arithmetic on the label, not intake advice.
computed| Measure | Value |
|---|---|
| Net contents as filed | 120 Vegetarian Capsule(s) |
| Serving size as filed | 1 Capsule(s) |
| Servings per container | 120 |
| Servings per day in the directions | 1 |
| Days per bottle | 120 days |
| Cost a month at the label suggested use | $9.25 a month at the label's suggested use (1 capsule a day) |
| $ per 30 days at 420 mg Daily Value | $38.85 |
Source · NIH DSLD 303743 · label 2024-02-22; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "24% Daily Value" mean here, and does it recompute?
The label declares 24% Daily Value; 100 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 24%, the same within one point.
computed| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 24% | 420 mg | 24% |
Source · NIH DSLD 303743; 21 CFR 101.9 · label 2024-02-22 · 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?
XYMOGEN Magnesium Citrate files 4 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 | Hypromellose |
| 2 | Water |
| 3 | Ascorbyl Palmitate |
| 4 | Silica |
| Shell | vegetarian |
| Target group | Vegan |
| Target group | Vegetarian |
| Target group | Adult (18 - 50 Years) |
2 additional rows
| Entry | Filed ingredient or declaration |
|---|---|
| Target group | Gluten Free |
| Target group | Dairy Free |
Source · NIH DSLD 303743 · label 2024-02-22; 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?
XYMOGEN has 2 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. XYMOGEN 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-1523-2013 | 2013-06-19 | Undeclared Soy and Milk on the label. | Terminated |
| F-0815-2014 | 2014-01-08 | Product was labeled as a medical food as opposed to a dietary supplement. | 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?
The same filed formulation appears on 2 labels from 2 brands; observed prices across them differ by an amount not yet observable.
computed| Label | Brand | Price per 100 mg |
|---|---|---|
| Woodstock Vitamins Magnesium Citrate | Woodstock Vitamins | No price |
| XYMOGEN Magnesium Citrate | XYMOGEN | $0.3083 |
Source · NIH DSLD 303743 · label 2024-02-22; 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 100 mg per unit, compared side by side on price and capsule verdict.
computed| Label | Elemental per unit | Price | Verdict |
|---|---|---|---|
| XYMOGEN Magnesium Citrate (DSLD 6139) | 100 mg | $36.99 · 2026-11-02 | Needs size 00 |
| Vitamin World Magnesium Citrate | 100 mg | No price | Needs size 00 |
| XYMOGEN Magnesium Citrate (DSLD 50041) | 100 mg | $36.99 · 2026-11-02 | Needs size 00 |
| Spring Valley Rapid-Release Magnesium Citrate 100 mg | 100 mg | No price | Needs size 00 |
| H-E-B Magnesium Citrate 100 mg | 100 mg | No price | Needs size 00 |
| Genestra Brands Magnesium | 100 mg | No price | Needs size 00 |
Source · NIH DSLD 303743 · label 2024-02-22; 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 303743 (label 2024-02-22, snapshot 2026-08-10), a price observed 2026-11-02 and the chemistry model of 2026-09-13. No data gap remains for the computed fields. The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 303743 |
| Scanned label (PDF) | Label 303743 scan |
| Label date | 2024-02-22 |
| Date entered into DSLD | 2024-02-22 |
| Barcode (UPC) as filed | 8 71149 00125 4 |
| Label version · Image difference, same product | NIH DSLD 218537 |
| Label version · Image difference, same product | NIH DSLD 6139 |
| Label version · Image difference, same product | NIH DSLD 28040 |
25 additional rows
| Field | As filed |
|---|---|
| Label version · Image difference, same product | NIH DSLD 50041 |
| Label version · Image difference, same product | NIH DSLD 66192 |
| Manufacturer | XYMOGEN Exclusive Professional Formulas, Orlando, FL |
| 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 daily, or as directed by your healthcare practitioner. |
| Precautions re: All Other | Consult your healthcare practitioner prior to use. |
| Precautions re: Pregnant or Nursing or Prescription Medications | Individuals taking medication should discuss potential interactions with their healthcare practitioner. |
| Precautions re: All Other | Do not use if tamper seal is damaged. |
| Formula re: Contains | Magnesium plays a vital role in hundreds of metabolic activities. The mineral particularly supports muscle and nervous system function. Magnesium Citrate supports healthy bowel movement by attracting water when it is in the intestine. |
| 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. |
| Storage | STORAGE: Keep closed in a cool, dry place out of reach of children. |
| Precautions re: Children | STORAGE: Keep closed in a cool, dry place out of reach of children. |
| Formulation re: Does NOT Contain | DOES NOT CONTAIN: Wheat, gluten, corn, yeast, soy, animal or dairy products, fish, shellfish, peanuts, tree nuts, egg, ingredients derived from genetically modified organisms (GMOs), artificial colors, artificial sweeteners, or artificial preservatives. |
| Seals/Symbols | Vegetarian caps |
| Brand IP Statement(s) re: (c), (TM), (SM) | Copyright 2018 XYMOGEN |
| FDA Statement of Identity | Dietary Supplement |
| Seals/Symbols | ePV (ePedigree Verification) |
| Brand IP Statement(s) re: (c), (TM), (SM) | Xymogen Exclusive professional formulas |
| Seals/Symbols | GMP compliant third-party verified |
| General Statements: All Other Content | Scan to learn more! This package is completely recyclable |
| Formulation re: Vegetarian/Vegan | Vegetarian caps |
| Physical state | Capsule |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 303743 · label 2024-02-22; 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.