Magnesium citrate
118
labels across all brands · median 217.5 mg/serving
Brand · NIH DSLD
Dr. Clark Store magnesium labels
Dr. Clark Store files 3 on-market magnesium labels using 2 different salts, with a median of 300 mg elemental magnesium per serving.
Labels (n)3
Median elemental mg/serving300 mg
Priced in gold set0
Mass budget · computed
What Dr. Clark Store's declared salts weigh
A Supplement Facts panel declares the element; the salt carrying it is heavier. Dividing each label's declared magnesium by its salt's elemental fraction gives the powder mass the serving must contain — and whether that fits a capsule.
| Capsule labels audited | 3 |
|---|---|
| Fit a size 0 or 00 capsule | 3 |
| Require the largest standard size, 000 | 0 |
| Exceed every standard capsule | 0 |
Method and the corpus-wide figure: label mass-budget audit.
Salt portfolio · as filed
Which magnesium salts Dr. Clark Store uses
| Salt | Labels | Elemental fraction | Compound needed per 100 mg |
|---|---|---|---|
| oxide | 2 | 60.32% | 166 mg |
| citrate | 1 | 11.3–16.16% | 619–885 mg |
Composition across the portfolio · as filed
What Dr. Clark Store puts in the capsule besides magnesium
- 2 labels use a gelatin shell.
Label declarations · as filed
What Dr. Clark Store claims on its labels
Filed declarations across this brand's labels: 1 distinct filed entries across 3 NIH DSLD labels, counted 2026-09-13; these are manufacturer statements.
- Adult (18 - 50 Years) — on 3 of 3 labels
What is not known · as of 2026-09-13
Gaps in the record for Dr. Clark Store
- 3 of 3 labels have no US retail listing matched as of 2026-09-13. That is a matching gap on our side, not evidence of unavailability.
Labels 3
| Magnesium 300 mgNIH DSLD · Label 215070 · Capsule | oxide | 300 mg | 21 | 6.30 g | Not tracked yet |
| Magnesium 300 mgNIH DSLD · Label 215806 · Capsule | oxide | 300 mg | 100 | 30.00 g | Not tracked yet |
| Magnesium Citrate 110 mgNIH DSLD · Label 215773 · Capsule | citrate | 330 mg | 33 | 10.89 g | Not tracked yet |
Forms filed
Compare within a form
Magnesium oxide
108
labels across all brands · median 310 mg/serving
See all brands, all labels, or the priced form tables.
The metric
What EC100 measures
EC100 = container price ÷ (elemental mg per serving × servings per container ÷ 100)
It normalizes the declared elemental amount to a 100 mg unit. It does not score ingredients, quality, or outcomes.