Label arithmetic · NIH DSLD 204716
Pure Encapsulations Magnesium EasySticks Natural Blueberry flavor
Pure Encapsulations Magnesium EasySticks Natural Blueberry flavor was observed at $9.97 on 2026-09-07, which is $0.22 per 100 mg of elemental magnesium; NIH DSLD 204716, label dated 2019-07-24, calculation 2026-09-13.
FDA recall records for Pure Encapsulations: 2 · queried 2026-09-13; brand-string matches across products.
Mass budget · computed; capsule comparison · modelled
What the declared salt would weigh
Pure Encapsulations Magnesium EasySticks Natural Blueberry flavor declares 150 mg of elemental magnesium per serving in NIH DSLD 204716, requiring 965.25–1,136.36 mg of magnesium malate under the salt model calculated 2026-09-13.
| Step | Value | Evidence |
|---|---|---|
| Declared elemental magnesium | 150 mg per serving | observed · label 2019-07-24 |
| Resolved salt | Magnesium malate · label-row | computed · name resolved from filed text |
| Reference formula | MgC₄H₄O₅; 156.38 g/mol | computed · chemical reference |
| Elemental fraction | 13.2–15.54% by mass | computed |
| Why the fraction is a range | anhydrous or dihydrate | modelled · hydrate not specified |
| Compound mass per serving | 965.25–1,136.36 mg = 150 mg ÷ elemental fraction | computed |
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
Pure Encapsulations Magnesium EasySticks Natural Blueberry flavor has 14 published fields below, traced to NIH DSLD 204716 and the 2026-08-10 registry snapshot, with calculations dated 2026-09-13.
| Field | Value | Evidence tier |
|---|---|---|
| NIH DSLD identifier | 204716 | observed |
| Resolved salt | Magnesium malate | computed |
| Source of the resolved salt | label-row | observed |
| Elemental magnesium per serving (mg) | 150 | observed |
| Servings per container | 30 | observed |
| Elemental magnesium per container (mg) | 4500 | computed |
| Compound mass per discrete unit | Discrete unit mass not computable as of 2026-09-13 | computed |
| Capsule fill verdict | not-applicable | modelled |
| Required standard capsule size | Capsule size not applicable or unresolved as of 2026-09-13 | modelled |
| Label date | 2019-07-24 | observed |
| Retail match confidence | legacy-verified | computed |
| Observed container price (USD) | 9.97 | observed |
| Price observation date | 2026-09-07 | observed |
| Cost per 100 mg elemental (USD) | 0.2216 | 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
Pure Encapsulations Magnesium EasySticks Natural Blueberry flavor retains 1 magnesium-related rows in NIH DSLD 204716, including 1 rows selected for the primary serving, from label 2019-07-24, examined 2026-09-13.
| Filed amount | Serving order | Filed salt / notes | Calculation role |
|---|---|---|---|
| 150 mg | 1 | malate Magnesium (Form: as Di-Magnesium Malate) | 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.
Within one salt · computed from observed prices
Cost per 100 mg within malate
Pure Encapsulations Magnesium EasySticks Natural Blueberry flavor's $0.2216 per 100 mg of elemental magnesium is at percentile 89 among 9 malate labels with observed prices, using confirmed gold-set matches observed 2026-08-10 to 2026-09-11, calculated 2026-09-13.
| Observed item price · Amazon | $9.97 on 2026-09-07 |
|---|---|
| Cost per 100 mg elemental | $0.2216 |
| Observed prices in malate | 9 confirmed matches |
| Percentile | 89 |
| Match confidence | legacy-verified |
Percentile = 100 × the number of prices at or below this EC100 ÷ the number of observed prices in this salt, rounded to an integer. Ties receive the same percentile. The comparison includes this label; a high percentile means higher observed cost. Price is the dated item observation, excluding tax, shipping, coupons and subscriptions.
Package arithmetic · observed inputs, computed totals
What the package works out to
Pure Encapsulations Magnesium EasySticks Natural Blueberry flavor files 30 servings per package, with no complete daily-frequency range for computing days, according to label 2019-07-24, calculated 2026-09-13.
| Net contents as filed | 30 Single-Serving Stick Pack(s) |
|---|---|
| Serving size as filed | 3.1 Gram(s) (1 stick pack) |
| Servings per package | 30 |
| Daily servings in the label instructions | Complete daily-frequency range not filed as of 2026-09-13 |
| Days per package at the label's own serving | Days not computable from filed frequency and serving count as of 2026-09-13 |
| Price per serving | $0.3323 · computed from price observed 2026-09-07 |
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
Pure Encapsulations Magnesium EasySticks Natural Blueberry flavor files 1 magnesium percent-daily-value entries in NIH DSLD 204716; 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
Pure Encapsulations Magnesium EasySticks Natural Blueberry flavor lists 4 other ingredients in NIH DSLD 204716, label dated 2019-07-24, examined 2026-09-13.
| Entry | Ingredient |
|---|---|
| 1 | Xylitol |
| 2 | Malic Acid |
| 3 | Citric Acid |
| 4 | Stevia leaf extract |
Capsule material: Not identified from the other-ingredient text as of 2026-09-13. The material classification follows the filed ingredient names; it is not a test of the shell.
Label declarations · observed
Target groups as filed
Pure Encapsulations Magnesium EasySticks Natural Blueberry flavor has 2 target-group entries in NIH DSLD 204716, label dated 2019-07-24, examined 2026-09-13.
| Entry | Filed group |
|---|---|
| 1 | Adult (18 - 50 Years) |
| 2 | Gluten Free |
Provenance · observed
Registry record, versions and scanned label
The registry holds 1 versions of this label for Pure Encapsulations Magnesium EasySticks Natural Blueberry flavor, according to the retained record examined 2026-09-13; the label date is 2019-07-24.
| NIH DSLD label | NIH DSLD 204716 |
|---|---|
| Registry snapshot | 2026-08-10 |
| Label date | 2019-07-24 |
| Physical state | Powder |
| Barcode as filed | 7 66298 01819 5 |
| Versions held by the registry | 1; version details are not available in this enrichment record as of 2026-09-13 |
| 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.