Magnesium glycinate
65
labels across all brands · median 300 mg/serving
Brand · NIH DSLD
Natural Factors magnesium labels
Natural Factors files 5 on-market magnesium labels using 2 different salts, with a median of 150 mg elemental magnesium per serving.
Labels (n)5
Median elemental mg/serving150 mg
Priced in gold set0
Mass budget · computed
What Natural Factors'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 | 0 |
| Require the largest standard size, 000 | 3 |
| Exceed every standard capsule | 0 |
Method and the corpus-wide figure: label mass-budget audit.
Salt portfolio · as filed
Which magnesium salts Natural Factors uses
| Salt | Labels | Elemental fraction | Compound needed per 100 mg |
|---|---|---|---|
| citrate | 4 | 11.3–16.16% | 619–885 mg |
| glycinate | 1 | 11.83–14.1% | 709–845 mg |
Composition across the portfolio · as filed
What Natural Factors puts in the capsule besides magnesium
- 4 of 5 labels list magnesium stearate. Stearate is 4.1% magnesium by mass and that magnesium is not on the Supplement Facts line; the amount of stearate is not declared, so it cannot be quantified.
- 3 labels use a gelatin shell.
- 1 label uses a cellulose-based shell.
Label declarations · as filed
What Natural Factors claims on its labels
Filed declarations across this brand's labels: 6 distinct filed entries across 5 NIH DSLD labels, counted 2026-09-13; these are manufacturer statements.
- Adult (18 - 50 Years) — on 5 of 5 labels
- Gluten Free — on 5 of 5 labels
- Dairy Free — on 5 of 5 labels
- Sugar Free — on 5 of 5 labels
- Vegan — on 2 of 5 labels
- Vegetarian — on 2 of 5 labels
What is not known · as of 2026-09-13
Gaps in the record for Natural Factors
- 5 of 5 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 5
| Magnesium Bisglycinate 200 mgNIH DSLD · Label 220953 · Powder | bisglycinate | 200 mg | 50 | 10.00 g | Not tracked yet |
| Magnesium Citrate 150 mgNIH DSLD · Label 220684 · Capsule | form not mapped yet | 150 mg | Not filed | — | Not tracked yet |
| Magnesium Citrate 150 mgNIH DSLD · Label 220688 · Capsule | form not mapped yet | 150 mg | Not filed | — | Not tracked yet |
| Magnesium Citrate 150 mgNIH DSLD · Label 282198 · Capsule | form not mapped yet | 150 mg | 360 | 54.00 g | Not tracked yet |
| Magnesium Citrate 150 mg Key LimeNIH DSLD · Label 220361 · Tablet or Pill | form not mapped yet | 150 mg | Not filed | — | Not tracked yet |
Forms filed
Compare within a form
See all brands, all labels, or the priced form tables.
Filed composition facets
6 published excipient facets occur across 5 labels from Natural Factors in the NIH DSLD records, counted 2026-09-13.
- magnesium stearate: 4 of 5 labels.
- microcrystalline cellulose: 4 of 5 labels.
- citric acid: 2 of 5 labels.
- hydroxypropyl cellulose: 1 of 5 labels.
- stearic acid: 1 of 5 labels.
- xylitol: 1 of 5 labels.
The FDA adverse event reporting system (CAERS) holds 9 reports naming Natural Factors 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.