Label arithmetic · NIH DSLD 323288
Irwin Naturals Magnesium + Ashwagandha
Irwin Naturals Magnesium + Ashwagandha declares 150 mg of elemental magnesium as hydroxide, which needs 120 mg of salt per unit and fits a standard size 0 capsule; NIH DSLD 323288, label dated 2025-02-23, calculation 2026-09-13.
FDA recall records for Irwin Naturals: 1 · queried 2026-09-13; brand-string matches across products.
Mass budget · computed; capsule comparison · modelled
What the declared salt would weigh
Irwin Naturals Magnesium + Ashwagandha declares 150 mg of elemental magnesium per serving in NIH DSLD 323288, requiring 359.88 mg of magnesium hydroxide under the salt model calculated 2026-09-13.
| Step | Value | Evidence |
|---|---|---|
| Declared elemental magnesium | 150 mg per serving | observed · label 2025-02-23 |
| Resolved salt | Magnesium hydroxide · label-row | computed · name resolved from filed text |
| Reference formula | Mg(OH)₂; 58.32 g/mol | computed · chemical reference |
| Elemental fraction | 41.68% by mass | computed |
| Compound mass per serving | 359.88 mg = 150 mg ÷ elemental fraction | computed |
| Compound mass per discrete unit | 119.96 mg | computed |
At powder density 0.6–0.8 g/mL, 120 mg of powder fits a size 0 capsule (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
Irwin Naturals Magnesium + Ashwagandha has 11 published fields below, traced to NIH DSLD 323288 and the 2026-08-10 registry snapshot, with calculations dated 2026-09-13.
| Field | Value | Evidence tier |
|---|---|---|
| NIH DSLD identifier | 323288 | observed |
| Resolved salt | Magnesium hydroxide | computed |
| Source of the resolved salt | label-row | observed |
| Elemental magnesium per serving (mg) | 150 | observed |
| Servings per container | 20 | observed |
| Elemental magnesium per container (mg) | 3000 | computed |
| Compound mass per discrete unit | 119.96 mg | computed |
| Capsule fill verdict | fits-0 | modelled |
| Required standard capsule size | 0 | modelled |
| Label date | 2025-02-23 | observed |
| Retail match confidence | unmatched | computed |
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
Irwin Naturals Magnesium + Ashwagandha retains 1 magnesium-related rows in NIH DSLD 323288, including 1 rows selected for the primary serving, from label 2025-02-23, examined 2026-09-13.
| Filed amount | Serving order | Filed salt / notes | Calculation role |
|---|---|---|---|
| 150 mg | 1 | hydroxide magnesium hydroxide from irish seawater, aquamin magnesium sea minerals | 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
Irwin Naturals Magnesium + Ashwagandha works out to 10–20 days per package at the label's own serving and filed frequency of 1–2 servings per day, according to label 2025-02-23, calculated 2026-09-13.
| Net contents as filed | 60 Liquid Softgel(s) |
|---|---|
| Discrete units in the package | 60 |
| Serving size as filed | 3 Liquid Soft-Gel(s) |
| Units per serving | 3 |
| Servings per package | 20 |
| Daily servings in the label instructions | 1–2 |
| Days per package at the label's own serving | 10–20 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.
Percent daily value · observed and computed
The label's percent daily value, recomputed
Irwin Naturals Magnesium + Ashwagandha files 1 magnesium percent-daily-value entries in NIH DSLD 323288; the check below applies the group-specific references in 21 CFR 101.9 to its 150 mg primary serving, calculated 2026-09-13.
| Group as filed | Declared | Reference | Recomputed | Difference |
|---|---|---|---|---|
| Adults and children 4 or more years of age | 36% | 420 mg | 36% | 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
Irwin Naturals Magnesium + Ashwagandha lists 11 other ingredients in NIH DSLD 323288, label dated 2025-02-23, examined 2026-09-13.
| Entry | Ingredient |
|---|---|
| 1 | Gelatin |
| 2 | Water, Purified |
| 3 | Glycerin |
| 4 | Beeswax |
| 5 | Sunflower Lecithin |
| 6 | Annatto |
| 7 | Titanium Dioxide |
| 8 | Dicalcium Phosphate |
| 9 | Caramel |
| 10 | Red Cabbage extract |
| 11 | Maltodextrin |
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
Irwin Naturals Magnesium + Ashwagandha has 2 target-group entries in NIH DSLD 323288, label dated 2025-02-23, examined 2026-09-13.
| Entry | Filed group |
|---|---|
| 1 | Adult (18 - 50 Years) |
| 2 | Women (not pregnant or lactating) |
Provenance · observed
Registry record, versions and scanned label
Irwin Naturals Magnesium + Ashwagandha is identified by 1 NIH DSLD record, 323288, according to the retained record examined 2026-09-13; the label date is 2025-02-23.
| NIH DSLD label | NIH DSLD 323288 |
|---|---|
| Registry snapshot | 2026-08-10 |
| Label date | 2025-02-23 |
| Physical state | Softgel Capsule |
| Barcode as filed | 8 40081 40432 4 |
| Source scan | Scanned label (NIH DSLD) |
| Calculation date | 2026-09-13 |
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
Irwin Naturals Magnesium + Ashwagandha has 1 unresolved data gaps in the retained NIH DSLD and price records as of 2026-09-13.
| Entry | Known gap |
|---|---|
| 1 | No confirmed US retail price matched to NIH DSLD 323288 (barcode 8 40081 40432 4) 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.