Brand · NIH DSLD
Doctor's Best magnesium labels
Doctor's Best files 1 on-market magnesium label using one salt, glycinate, with a median of 200 mg elemental magnesium per serving.
Mass budget · computed
What Doctor's Best'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 Doctor's Best uses
| Salt | Labels | Elemental fraction | Compound needed per 100 mg |
|---|---|---|---|
| glycinate | 1 | 11.83–14.1% | 709–845 mg |
Composition across the portfolio · as filed
What Doctor's Best puts in the capsule besides magnesium
- 1 of 1 label lists 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.
- 1 label uses a cellulose-based shell.
Label declarations · as filed
What Doctor's Best claims on its labels
Filed declarations across this brand's labels: 4 distinct filed entries across 1 NIH DSLD labels, counted 2026-09-13; these are manufacturer statements.
- Vegan — on 1 of 1 label
- Vegetarian — on 1 of 1 label
- Adult (18 - 50 Years) — on 1 of 1 label
- Gluten Free — on 1 of 1 label
What is not known · as of 2026-09-13
Gaps in the record for Doctor's Best
- 1 of 1 label has no US retail listing matched as of 2026-09-13. That is a matching gap on our side, not evidence of unavailability.
Labels 1
| CoQ10 L-Carnitine MagnesiumNIH DSLD · Label 203385 · Capsule | form not mapped yet | 200 mg | 30 | 6.00 g | Not tracked yet |
Forms filed
Compare within a form
These labels file no magnesium form text (form not mapped yet).
See all brands, all labels, or the priced form tables.
Filed composition facets
3 published excipient facets occur across 1 labels from Doctor's Best in the NIH DSLD records, counted 2026-09-13.
- magnesium stearate: 1 of 1 labels.
- microcrystalline cellulose: 1 of 1 labels.
- silicon dioxide: 1 of 1 labels.
The FDA adverse event reporting system (CAERS) holds 28 reports naming Doctor's Best 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.