Magnesium citrate
118
labels across all brands · median 217.5 mg/serving
Brand · NIH DSLD
Life Extension magnesium labels
Life Extension files 6 on-market magnesium labels using one salt, citrate, with a median of 250 mg elemental magnesium per serving.
Labels (n)6
Median elemental mg/serving250 mg
Priced in gold set0
Mass budget · computed
What Life Extension'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 | 1 |
|---|---|
| Fit a size 0 or 00 capsule | 1 |
| 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 Life Extension uses
| Salt | Labels | Elemental fraction | Compound needed per 100 mg |
|---|---|---|---|
| citrate | 1 | 11.3–16.16% | 619–885 mg |
Composition across the portfolio · as filed
What Life Extension puts in the capsule besides magnesium
- 6 labels use a cellulose-based shell.
Label declarations · as filed
What Life Extension claims on its labels
Filed declarations across this brand's labels: 2 distinct filed entries across 6 NIH DSLD labels, counted 2026-09-13; these are manufacturer statements.
- Adult (18 - 50 Years) — on 6 of 6 labels
- Gluten Free — on 5 of 6 labels
What is not known · as of 2026-09-13
Gaps in the record for Life Extension
- 5 of 6 labels do not name the magnesium salt in the filed record, so no compound mass can be computed for them.
- 6 of 6 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 6
| Extend-Release MagnesiumNIH DSLD · Label 74054 · Capsule | citrate, oxide | 250 mg | Not filed | — | Not tracked yet |
| Extend-Release MagnesiumNIH DSLD · Label 328453 · Capsule | form not mapped yet | 250 mg | 60 | 15.00 g | Not tracked yet |
| Magnesium (Citrate) 100 mgNIH DSLD · Label 328564 · Capsule | form not mapped yet | 100 mg | 100 | 10.00 g | Not tracked yet |
| Magnesium Caps 500 mgNIH DSLD · Label 328565 · Capsule | form not mapped yet | 500 mg | 100 | 50.00 g | Not tracked yet |
| Potassium with Extend-Release MagnesiumNIH DSLD · Label 328641 · Capsule | form not mapped yet | 250 mg | 60 | 15.00 g | Not tracked yet |
| Potassium with Extend-Release MagnesiumNIH DSLD · Label 334872 · Capsule | form not mapped yet | 250 mg | 60 | 15.00 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.
Filed composition facets
6 published excipient facets occur across 6 labels from Life Extension in the NIH DSLD records, counted 2026-09-13.
- cellulose: 6 of 6 labels.
- microcrystalline cellulose: 5 of 6 labels.
- silicon dioxide: 5 of 6 labels.
- medium chain triglycerides: 4 of 6 labels.
- hypromellose: 3 of 6 labels.
- stearic acid: 3 of 6 labels.
The FDA adverse event reporting system (CAERS) holds 113 reports naming Life Extension as of 2026-09-13. This is a count of submitted reports across all the firm's products; it is not an incidence rate and implies no causation.
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.