Label arithmetic · NIH DSLD 20857

Vitamin World Magnesium Citrate 250 mg

Vitamin World Magnesium Citrate 250 mg declares 250 mg of elemental magnesium per serving as citrate, which would require 1,547–2,212 mg of the salt in each unit — more than the 1,100 mg a size 000 capsule holds; NIH DSLD 20857, label dated 2013-04-25, calculation 2026-09-13.

Mass budget · computed; capsule comparison · modelled

What the declared salt would weigh

Vitamin World Magnesium Citrate 250 mg declares 250 mg of elemental magnesium per serving in NIH DSLD 20857, requiring 1,547.03–2,212.39 mg of magnesium citrate under the salt model calculated 2026-09-13.

Elemental-to-compound conversion for NIH DSLD 20857
StepValueEvidence
Declared elemental magnesium250 mg per servingobserved · label 2013-04-25
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 serving1,547.03–2,212.39 mg = 250 mg ÷ elemental fractioncomputed
Compound mass per discrete unit1,547.03–2,212.39 mgcomputed

At powder density 0.6–0.8 g/mL, 1,547 mg of powder exceeds every standard capsule size — the largest, 000, holds about 1,100 mg.

If the declared salt were the sole source of magnesium here, each capsule would need 1,547 mg of powder, which no standard capsule holds. So the label does not establish citrate as the only source. A blend with a denser salt or a non-standard capsule could reconcile it. This is a statement about the label's arithmetic, not about what is in the bottle.

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

Vitamin World Magnesium Citrate 250 mg has 11 published fields below, traced to NIH DSLD 20857 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 identifier20857observed
Resolved saltMagnesium citratecomputed
Source of the resolved saltlabel-rowobserved
Elemental magnesium per serving (mg)250observed
Servings per containerServings not filed as of 2026-09-13observed
Elemental magnesium per container (mg)Container magnesium not computable as of 2026-09-13computed
Compound mass per discrete unit1,547.03–2,212.39 mgcomputed
Capsule fill verdictexceeds-allmodelled
Required standard capsule sizeNo standard size fits as of 2026-09-13modelled
Label date2013-04-25observed
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

Vitamin World Magnesium Citrate 250 mg retains 1 magnesium-related rows in NIH DSLD 20857, including 1 rows selected for the primary serving, from label 2013-04-25, examined 2026-09-13.

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

Magnesium (Form: as Magnesium 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

Vitamin World Magnesium Citrate 250 mg has no filed serving count for package arithmetic in NIH DSLD 20857, according to label 2013-04-25, calculated 2026-09-13.

Arithmetic using the label's own serving, not intake advice
Net contents as filed90 Rapid Release Capsule(s)
Discrete units in the package90
Serving size as filed1 Capsule(s)
Units per serving1
Servings per packageServings not filed as of 2026-09-13
Daily servings in the label instructions1
Days per package at the label's own servingDays not computable from filed frequency and serving count as of 2026-09-13

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.

Percent daily value · observed and computed

The label's percent daily value, recomputed

Vitamin World Magnesium Citrate 250 mg files 1 magnesium percent-daily-value entries in NIH DSLD 20857; the check below applies the group-specific references in 21 CFR 101.9 to its 250 mg primary serving, calculated 2026-09-13.

Declared values and current-reference arithmetic
Group as filedDeclaredReferenceRecomputedDifference
Adults and children 4 or more years of age63%420 mg60%3 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

Vitamin World Magnesium Citrate 250 mg lists 4 other ingredients in NIH DSLD 20857, label dated 2013-04-25, examined 2026-09-13.

Other ingredients as filed
EntryIngredient
1Gelatin
2Citric Acid
3Vegetable Cellulose
4Contains Less Than 2% of

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

Label declarations · observed

Target groups as filed

Vitamin World Magnesium Citrate 250 mg has 4 target-group entries in NIH DSLD 20857, label dated 2013-04-25, examined 2026-09-13.

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

Provenance · observed

Registry record, versions and scanned label

Vitamin World Magnesium Citrate 250 mg is identified by 1 NIH DSLD record, 20857, according to the retained record examined 2026-09-13; the label date is 2013-04-25.

Source record for Vitamin World Magnesium Citrate 250 mg
NIH DSLD labelNIH DSLD 20857
Registry snapshot2026-08-10
Label date2013-04-25
Physical stateCapsule
Barcode as filed7 66443 33098 1
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

Vitamin World Magnesium Citrate 250 mg has 2 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 20857 (barcode 7 66443 33098 1) as of 2026-09-13.
2Servings per container are not filed; container magnesium and package duration cannot be computed 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.