Label arithmetic · NIH DSLD 297224

Kirkman Magnesium Malate

Kirkman Magnesium Malate declares 160 mg of elemental magnesium as malate, which needs 1,030–1,212 mg of salt per unit — a size 000 capsule or larger; NIH DSLD 297224, label dated 2023-09-25, calculation 2026-09-13.

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

Mass budget · computed; capsule comparison · modelled

What the declared salt would weigh

Kirkman Magnesium Malate declares 160 mg of elemental magnesium per serving in NIH DSLD 297224, requiring 1,029.6–1,212.12 mg of magnesium malate under the salt model calculated 2026-09-13.

Elemental-to-compound conversion for NIH DSLD 297224
StepValueEvidence
Declared elemental magnesium160 mg per servingobserved · label 2023-09-25
Resolved saltMagnesium malate · full-recordcomputed · name resolved from filed text
Reference formulaMgC₄H₄O₅; 156.38 g/molcomputed · chemical reference
Elemental fraction13.2–15.54% by masscomputed
Why the fraction is a rangeanhydrous or dihydratemodelled · hydrate not specified
Compound mass per serving1,029.6–1,212.12 mg = 160 mg ÷ elemental fractioncomputed
Compound mass per discrete unit1,029.6–1,212.12 mgcomputed

At powder density 0.6–0.8 g/mL, 1,030 mg of powder requires the largest standard size, 000 (holds about 1,100 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

Kirkman Magnesium Malate has 11 published fields below, traced to NIH DSLD 297224 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 identifier297224observed
Resolved saltMagnesium malatecomputed
Source of the resolved saltfull-recordobserved
Elemental magnesium per serving (mg)160observed
Servings per container120observed
Elemental magnesium per container (mg)19200computed
Compound mass per discrete unit1,029.6–1,212.12 mgcomputed
Capsule fill verdictneeds-000modelled
Required standard capsule size000modelled
Label date2023-09-25observed
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

Kirkman Magnesium Malate retains 1 magnesium-related rows in NIH DSLD 297224, including 1 rows selected for the primary serving, from label 2023-09-25, examined 2026-09-13.

Filed amounts, salt names and serving order
Filed amountServing orderFiled salt / notesCalculation role
160 mg1Salt not identified in this row as of 2026-09-13Selected 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

Kirkman Magnesium Malate works out to 120 days per package at the label's own serving and filed frequency of 1 servings per day, according to label 2023-09-25, calculated 2026-09-13.

Arithmetic using the label's own serving, not intake advice
Net contents as filed120 Capsule(s)
Discrete units in the package120
Serving size as filed1–3 Capsule(s)
Units per serving1–3
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 · 9 observed prices in malate

A same-salt reference for this package

At the median cost per 100 mg observed across 9 malate labels ($0.1142), a package of this size (19,200 mg elemental in Kirkman Magnesium Malate) would correspond to $21.93, 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 malate · n = 9
Median observed cost per 100 mg$0.1142
Filed elemental magnesium per package19,200 mg
Benchmark package equivalent$21.93 = 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

Kirkman Magnesium Malate files 1 magnesium percent-daily-value entries in NIH DSLD 297224; the check below applies the group-specific references in 21 CFR 101.9 to its 160 mg primary serving, calculated 2026-09-13.

Declared values and current-reference arithmetic
Group as filedDeclaredReferenceRecomputedDifference
Adults and children 4 or more years of age38%420 mg38%0 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

Kirkman Magnesium Malate lists 3 other ingredients in NIH DSLD 297224, label dated 2023-09-25, examined 2026-09-13.

Other ingredients as filed
EntryIngredient
1Hypromellose
2Water
3Magnesium Stearate

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

Kirkman Magnesium Malate has 3 target-group entries in NIH DSLD 297224, label dated 2023-09-25, examined 2026-09-13.

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

Provenance · observed

Registry record, versions and scanned label

The registry holds 1 versions of this label for Kirkman Magnesium Malate, according to the retained record examined 2026-09-13; the label date is 2023-09-25.

Source record for Kirkman Magnesium Malate
NIH DSLD labelNIH DSLD 297224
Registry snapshot2026-08-10
Label date2023-09-25
Physical stateCapsule
Barcode as filed8 12325 02141 3
Versions held by the registry1; version details are not available in this enrichment record as of 2026-09-13
Source scanScanned label (NIH DSLD)
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

Kirkman Magnesium Malate 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 297224 (barcode 8 12325 02141 3) 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.