Magnesium aspartate
33
labels across all brands · median 200 mg/serving
Brand · NIH DSLD
GNC magnesium labels
GNC files 8 on-market magnesium labels using 3 different salts, with a median of 250 mg elemental magnesium per serving.
Labels (n)8
Median elemental mg/serving250 mg
Priced in gold set2
Mass budget · computed
What GNC'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 | 2 |
|---|---|
| Fit a size 0 or 00 capsule | 1 |
| Require the largest standard size, 000 | 1 |
| Exceed every standard capsule | 0 |
Method and the corpus-wide figure: label mass-budget audit.
Salt portfolio · as filed
Which magnesium salts GNC uses
| Salt | Labels | Elemental fraction | Compound needed per 100 mg |
|---|---|---|---|
| oxide | 3 | 60.32% | 166 mg |
| citrate | 1 | 11.3–16.16% | 619–885 mg |
| aspartate | 1 | 8.42% | 1,188 mg |
Composition across the portfolio · as filed
What GNC puts in the capsule besides magnesium
- 6 of 8 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.
- 4 labels use a cellulose-based shell.
Label declarations · as filed
What GNC claims on its labels
Filed declarations across this brand's labels: 5 distinct filed entries across 8 NIH DSLD labels, counted 2026-09-13; these are manufacturer statements.
- Adult (18 - 50 Years) — on 8 of 8 labels
- Gluten Free — on 7 of 8 labels
- Dairy Free — on 6 of 8 labels
- Sugar Free — on 5 of 8 labels
- Kosher — on 1 of 8 labels
What is not known · as of 2026-09-13
Gaps in the record for GNC
- 3 of 8 labels do not name the magnesium salt in the filed record, so no compound mass can be computed for them.
- 6 of 8 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 8
| Calcimate Plus with Magnesium & Vitamin D-3NIH DSLD · Label 223579 · Other (e.g. tea bag) | oxide | 100 mg | 125 | 12.50 g | Not tracked yet |
| Calcimate Plus with Magnesium & Vitamin D-3NIH DSLD · Label 224614 · Other (e.g. tea bag) | oxide | 100 mg | 60 | 6.00 g | Not tracked yet |
| Magnesium 250 mgNIH DSLD · Label 224666 · Tablet or Pill | gluconate, oxide | 250 mg | Not filed | — | Not tracked yet |
| Magnesium 250 mg Strawberry Natural FlavorNIH DSLD · Label 243072 · Other (e.g. tea bag) | citrate | 250 mg | 30 | 7.50 g | Verified |
| Magnesium 500 mgNIH DSLD · Label 224740 · Capsule | oxide | 500 mg | Not filed | — | Not tracked yet |
| Magnesium Powder LemonNIH DSLD · Label 243047 · Powder | carbonate, citrate | 325 mg | 84 | 27.30 g | Verified |
| Potassium & Magnesium Aspartate 250 mgNIH DSLD · Label 224653 · Capsule | aspartate | 20 mg | Not filed | — | Not tracked yet |
| Super Magnesium 400 mgNIH DSLD · Label 224737 · Other (e.g. tea bag) | aspartate, citrate, lactate | 400 mg | 45 | 18.00 g | Not tracked yet |
Forms filed
Compare within a form
Magnesium carbonate
9
labels across all brands · median 350 mg/serving
Magnesium citrate
118
labels across all brands · median 217.5 mg/serving
Magnesium gluconate
14
labels across all brands · median 133 mg/serving
Magnesium lactate
2
labels across all brands · median 400 mg/serving
Magnesium oxide
108
labels across all brands · median 310 mg/serving
See all brands, all labels, or the priced form tables.
Filed composition facets
18 published excipient facets occur across 8 labels from GNC in the NIH DSLD records, counted 2026-09-13.
- magnesium stearate: 6 of 8 labels.
- microcrystalline cellulose: 6 of 8 labels.
- silicon dioxide: 5 of 8 labels.
- hypromellose: 4 of 8 labels.
- polyethylene glycol: 4 of 8 labels.
- titanium dioxide: 4 of 8 labels.
- carnauba wax: 3 of 8 labels.
- croscarmellose sodium: 3 of 8 labels.
- gelatin: 3 of 8 labels.
- citric acid: 2 of 8 labels.
- malic acid: 2 of 8 labels.
- natural flavors: 2 of 8 labels.
- stearic acid: 2 of 8 labels.
- dicalcium phosphate: 1 of 8 labels.
- glycerin: 1 of 8 labels.
- maltodextrin: 1 of 8 labels.
- stevia: 1 of 8 labels.
- talc: 1 of 8 labels.
FDA recall records for this firm
The FDA enforcement database holds 3 recall records naming GNC (queried 2026-09-13); 0 of them concern a magnesium product.
These are exact brand-string matches in the recalling-firm field or product description, including other products. A name match does not establish that two similarly named firms are the same legal entity. The recalling firm and recalled product are shown in each row.
| Report date | Class | Product described by FDA | Reason for recall | Status | openFDA record |
|---|---|---|---|---|---|
| 2025-06-11 | Class III | GNC Women's 30+ Vitapak, Carton of 30 Sachets. Each sachet contains four tablets and a capsule. Paper-board carton that measures 10.25 width x 3.56 height x 3.15 depth containing 30 sachets of 3 width x 2.75 height with tear notch. 15 Cartons per Case Recalling firm: GNC Holdings LLC. Description does not name a magnesium product. | Undeclared Fish allergen (parvalbumin). | Terminated | F-0928-2025 |
| 2022-09-21 | Class III | GNC Vitamin B-6 100mg 100 VEGETARIAN TABLETS DIETARY SUPPLEMENTS Distributed by: General Nutrition Corporation Pittsburgh, PA 15222 UPC 0 48107 20584 3 Recalling firm: General Nutrition Inc. Description does not name a magnesium product. | The firm was notified by a customer that the bottle contains green and white capsules instead of the usual white round tablets. They contacted their manufacturer to investigate the issue and the manufacture stated that there was a problem at the filling line. Bottles labeled as Vitamin B6 actually contained Pycnogenol. | Terminated | F-1734-2022 |
| 2016-12-14 | Class I | GNC, Womens Ultra Mega, Dietary Supplement, 180 Caplets, Recalling firm: Nutra Manufacturing. Description does not name a magnesium product. | Undeclared Allergen: Milk. | Terminated | F-0626-2017 |
FDA assigns 3 recall classes by the assessed hazard, using the FDA classification definitions, checked 2026-09-13:
- Class I: Exposure to or use of the violating product carries a reasonable probability of serious harm to health or death.
- Class II: Exposure or use may produce temporary or medically reversible harm; the probability of serious harm is remote.
- Class III: Adverse health consequences from exposure or use are unlikely.
The FDA adverse event reporting system (CAERS) holds 684 reports naming GNC 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.