Label arithmetic · NIH DSLD 6139

XYMOGEN Magnesium Citrate

XYMOGEN Magnesium Citrate declares 100 mg of elemental magnesium as citrate, which needs 619–885 mg of salt per unit — a size 00 capsule or larger; NIH DSLD 6139, label dated 2012-03-23, calculation 2026-09-13.

FDA recall records for XYMOGEN: 2 · queried 2026-09-13; brand-string matches across products.

Mass budget · computed; capsule comparison · modelled

What the declared salt would weigh

XYMOGEN Magnesium Citrate declares 100 mg of elemental magnesium per serving in NIH DSLD 6139, requiring 618.81–884.96 mg of magnesium citrate under the salt model calculated 2026-09-13.

Elemental-to-compound conversion for NIH DSLD 6139
StepValueEvidence
Declared elemental magnesium100 mg per servingobserved · label 2012-03-23
Resolved saltMagnesium citrate · label-rowcomputed · name resolved from filed text
Reference formulaMg₃(C₆H₅O₇)₂; 451.11 g/molcomputed · chemical reference
Elemental fraction11.3–16.16% by masscomputed
Why the fraction is a rangetrimagnesium dicitrate 16.2%; dibasic and hydrated forms as low as 11.3%modelled · hydrate not specified
Compound mass per serving618.81–884.96 mg = 100 mg ÷ elemental fractioncomputed
Compound mass per discrete unit618.81–884.96 mgcomputed

At powder density 0.6–0.8 g/mL, 619 mg of powder requires at least a size 00 capsule (a size 0 holds about 545 mg).

The verdict uses the most favourable reading for the product — the smallest compound mass the label allows. It excludes the shell and other ingredients; their unreported masses are not added as guesses.

Size 0 holds about 545 mg, size 00 about 730 mg, and size 000 about 1,100 mg at powder density 0.6–0.8 g/mL. These are model inputs, not measurements of this product's capsule. Read the mass-budget method.

Label facts and derived measurements

The numbers for this label

XYMOGEN Magnesium Citrate has 11 published fields below, traced to NIH DSLD 6139 and the 2026-08-10 registry snapshot, with calculations dated 2026-09-13.

Values published in this page's Product metadata
FieldValueEvidence tier
NIH DSLD identifier6139observed
Resolved saltMagnesium citratecomputed
Source of the resolved saltlabel-rowobserved
Elemental magnesium per serving (mg)100observed
Servings per container120observed
Elemental magnesium per container (mg)12000computed
Compound mass per discrete unit618.81–884.96 mgcomputed
Capsule fill verdictneeds-00modelled
Required standard capsule size00modelled
Label date2012-03-23observed
Retail match confidenceunmatchedcomputed

Observed means a value transcribed from a label or price observation. Computed means arithmetic or normalization of those inputs. Modelled means the result depends on a stated physical assumption, including capsule capacity. Evidence tiers and their limits.

Source transcription · observed

Magnesium lines as filed

XYMOGEN Magnesium Citrate retains 1 magnesium-related rows in NIH DSLD 6139, including 1 rows selected for the primary serving, from label 2012-03-23, examined 2026-09-13.

Filed amounts, salt names and serving order
Filed amountServing orderFiled salt / notesCalculation role
100 mg1citrate

Magnesium (Form: as citrate)

Selected primary serving

The elemental amount comes from the selected magnesium line. A salt named under another nutrient does not make that nutrient's quantity an elemental magnesium value. Distinct unresolved primary amounts remain ambiguous; they are not added together.

Package arithmetic · observed inputs, computed totals

What the package works out to

XYMOGEN Magnesium Citrate works out to 120 days per package at the label's own serving and filed frequency of 1 servings per day, according to label 2012-03-23, calculated 2026-09-13.

Arithmetic using the label's own serving, not intake advice
Net contents as filed120 Vegetable Capsule(s)
Discrete units in the package120
Serving size as filed1 Capsule(s)
Units per serving1
Servings per package120
Daily servings in the label instructions1
Days per package at the label's own serving120 days

Days = filed servings per container ÷ filed servings per day. If the label gives a frequency range, the largest frequency gives the shortest duration. Cost per serving = observed item price ÷ filed servings; cost per label-day multiplies this by the filed frequency. This follows the label's own instructions; it is package arithmetic, not intake advice.

Benchmark · 19 observed prices in citrate

A same-salt reference for this package

At the median cost per 100 mg observed across 19 citrate labels ($0.1039), a package of this size (12,000 mg elemental in XYMOGEN Magnesium Citrate) would correspond to $12.47, using observations from 2026-08-10 to 2026-09-11, calculated 2026-09-13. This is a benchmark, not a retailer quote.

Same-salt benchmark working
Salt and number of observationsMagnesium citrate · n = 19
Median observed cost per 100 mg$0.1039
Filed elemental magnesium per package12,000 mg
Benchmark package equivalent$12.47 = median EC100 × package elemental mg ÷ 100
Evidence tierbenchmark · calculated 2026-09-13

The median is the middle sorted observation, or the average of the two middle observations for an even group. Each label contributes one observation. This value is neither an offer nor an estimate of a specific retailer's current price.

Percent daily value · observed and computed

The label's percent daily value, recomputed

XYMOGEN Magnesium Citrate files 1 magnesium percent-daily-value entries in NIH DSLD 6139; the check below applies the group-specific references in 21 CFR 101.9 to its 100 mg primary serving, calculated 2026-09-13.

Declared values and current-reference arithmetic
Group as filedDeclaredReferenceRecomputedDifference
Adults and children 4 or more years of age25%420 mg24%1 percentage points

Percent daily value = declared elemental mg ÷ the group's reference mg × 100, rounded to an integer. The adult and age-four-plus reference is 420 mg. Historical labels can use earlier references; a difference does not establish a filing error. Full-record entries may cover multiple serving sizes, so this table identifies the primary-serving basis explicitly. Group references and interpretation.

Composition · observed

Other ingredients in the filed record

XYMOGEN Magnesium Citrate lists 4 other ingredients in NIH DSLD 6139, label dated 2012-03-23, examined 2026-09-13.

Other ingredients as filed
EntryIngredient
1Cellulose
2Stearic Acid
3Magnesium Stearate
4Silica

Capsule material: vegetarian. The material classification follows the filed ingredient names; it is not a test of the shell.

This label lists magnesium stearate, whose reference elemental fraction is 4.1% by mass. No stearate quantity is available in this record as of 2026-09-13, so its magnesium contribution cannot be quantified or added to the Supplement Facts magnesium total.

Label declarations · observed

Target groups as filed

XYMOGEN Magnesium Citrate has 4 target-group entries in NIH DSLD 6139, label dated 2012-03-23, examined 2026-09-13.

Manufacturer-filed target groups
EntryFiled group
1Vegan
2Vegetarian
3Adult (18 - 50 Years)
4Gluten Free

Provenance · observed

Registry record, versions and scanned label

The registry holds 5 versions of this label for XYMOGEN Magnesium Citrate, according to the retained record examined 2026-09-13; the label date is 2012-03-23.

Source record for XYMOGEN Magnesium Citrate
NIH DSLD labelNIH DSLD 6139
Registry snapshot2026-08-10
Label date2012-03-23
Physical stateCapsule
Barcode as filedBarcode not filed as of 2026-09-13
Versions held by the registry5; version details are not available in this enrichment record as of 2026-09-13
Calculation date2026-09-13

The barcode is retained as an identifier, not as proof of a retail match. A registry version count records the number held; it does not reveal what changed. The label date, registry snapshot and price-observation date describe different events.

Gaps in this record

What is not available for this label

XYMOGEN Magnesium Citrate has 1 unresolved data gaps in the retained NIH DSLD and price records as of 2026-09-13.

Dated missing-data statements
EntryKnown gap
1No confirmed US retail price matched to NIH DSLD 6139; no barcode is filed as of 2026-09-13.

An unmatched retail price describes our matching coverage. It does not establish that a product is unavailable. The elemental cost calculator can apply the same EC100 formula to a price you supply.