Magnesium citrate
118
labels across all brands · median 217.5 mg/serving
Brand · NIH DSLD
Protocol For Life Balance files 3 on-market magnesium labels, and 1 of the 2 audited declare more of the named salt than a standard capsule can hold.
Mass budget · computed
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 | 0 |
| Require the largest standard size, 000 | 1 |
| Exceed every standard capsule | 1 |
Method and the corpus-wide figure: label mass-budget audit.
Salt portfolio · as filed
| Salt | Labels | Elemental fraction | Compound needed per 100 mg |
|---|---|---|---|
| citrate | 2 | 11.3–16.16% | 619–885 mg |
| L-threonate | 1 | 8.25% | 1,212 mg |
Composition across the portfolio · as filed
Label declarations · as filed
Filed declarations across this brand's labels: 6 distinct filed entries across 3 NIH DSLD labels, counted 2026-09-13; these are manufacturer statements.
What is not known · as of 2026-09-13
| Magnesium CitrateNIH DSLD · Label 73011 · Tablet or Pill | citrate | 400 mg | 50 | 20.00 g | Not tracked yet |
| Magnesium CitrateNIH DSLD · Label 292266 · Softgel Capsule | form not mapped yet | 400 mg | 60 | 24.00 g | Not tracked yet |
| Magtein Magnesium L-ThreonateNIH DSLD · Label 326454 · Capsule | threonate | 144 mg | 30 | 4.32 g | Not tracked yet |
Forms filed
118
labels across all brands · median 217.5 mg/serving
4
labels across all brands · median 144 mg/serving
See all brands, all labels, or the priced form tables.
11 published excipient facets occur across 3 labels from Protocol For Life Balance in the NIH DSLD records, counted 2026-09-13.
1 published clusters include labels from Protocol For Life Balance, matched by filed ingredients and serving structure on 2026-09-13.
The FDA enforcement database holds 1 recall records naming Protocol For Life Balance (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 |
|---|---|---|---|---|---|
| 2024-02-14 | Class III | Protocol for Life Balance, Phosphatidyl Serine 300mg softgels, 50 count bottle, UPC 707359123922. NOW Foods, Phosphatidyl Serine 300mg softgels, 50 count bottle, UPC 733739023926. Recalling firm: Now Foods. Description does not name a magnesium product. | Amount of Phosphatidyl Serine in product is less than stated on the label | Terminated | F-0859-2024 |
FDA assigns 3 recall classes by the assessed hazard, using the FDA classification definitions, checked 2026-09-13:
The FDA adverse event reporting system (CAERS) holds 3 reports naming Protocol For Life Balance 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
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.