Brand · NIH DSLD snapshot 2026-08-10
Jarrow Formulas magnesium supplements: 1 product, 100 mg of magnesium per serving
1 Jarrow Formulas magnesium product, median 100 mg of magnesium per serving. Inside: each product's mg and price.
Jarrow Formulas files one on-market magnesium label in NIH DSLD, Jarrow Formulas Magnesium Optimizer, declaring 100 mg of elemental magnesium per serving; no capsule verdict is computable. Snapshot 2026-08-10.
computed from filed labelsData release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-11-02 · chemistry 2026-10-17
Elemental: The magnesium itself; the rest of the compound weight is the partner molecule.
Size 000: The largest standard capsule, about 1,100 mg of powder at 0.8 g/mL, the top of the usual 0.6–0.8 range.
Estimated salt mass versus assumed capsule capacity
No Jarrow Formulas capsule label has a single resolved salt and one declared amount as of 2026-08-10, so no capsule verdict is counted.
computed with assumption| Verdict | Jarrow Formulas | All audited capsule labels |
|---|---|---|
| Fits size 0 or 00 | no audited capsule label | 82 of 137 |
| Needs size 000 | no audited capsule label | 47 of 137 |
| Exceeds size 000 | no audited capsule label | 8 of 137 |
Source · NIH DSLD labels; mass balance · recognized salt only; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How do Jarrow Formulas' prices compare within each salt?
No Jarrow Formulas label has a matched US retail price in our price collection as of 2026-11-02, against 1 label on file.
computed| Label | Salt | Per 100 mg | Same-salt median | Observed |
|---|---|---|---|---|
| No matched price as of 2026-11-02 |
Source · Amazon via licensed data provider; NIH DSLD · unique ASIN × date; prices observed 2026-10-26 to 2026-11-02 · release 2026-08-10-f441aa9f · CSV · method
Does the FDA hold recall or adverse event records naming Jarrow Formulas?
The FDA enforcement data queried 2026-10-19 holds 1 recall record naming Jarrow Formulas, 0 of them about a magnesium product. CAERS holds adverse event reports naming the brand, as it does for 143 of 273 brands here; openFDA states that “there is no certainty that the reported event (adverse event) was actually due to the product” and that reports “cannot be used to estimate the incidence of these events.”
measured| Recall | Date | Reason | Status |
|---|---|---|---|
| F-0682-2018 | 2018-02-07 | A higher than normal micro result was found at the six month time point for one lot of Liquid L-Carnitine. | Terminated |
FDA record register and matching method
Source · openFDA enforcement and CAERS · queried 2026-10-19 · release 2026-08-10-f441aa9f · CSV · method
What else goes into Jarrow Formulas' labels, and what do they declare?
1 of 1 Jarrow Formulas labels list magnesium stearate, 0 use a gelatin shell and 1 a cellulose shell; 6 distinct filed declarations appear across them. Listed ingredients are filed names, not quantities.
measured| Filed entry | Labels |
|---|---|
| calcium carbonate | 1 of 1 |
| croscarmellose sodium | 1 of 1 |
| glycerin | 1 of 1 |
| hydroxypropyl cellulose | 1 of 1 |
| hypromellose | 1 of 1 |
| magnesium stearate | 1 of 1 |
| microcrystalline cellulose | 1 of 1 |
| silicon dioxide | 1 of 1 |
6 additional rows
| Filed entry | Labels |
|---|---|
| Vegan | 1 of 1 |
| Vegetarian | 1 of 1 |
| Adult (18 - 50 Years) | 1 of 1 |
| No Allergies | 1 of 1 |
| Gluten Free | 1 of 1 |
| Dairy Free | 1 of 1 |
Source · NIH DSLD labels · snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Which Jarrow Formulas labels are on file, and what does each declare?
Jarrow Formulas has 1 on-market label in the NIH DSLD snapshot 2026-08-10, with a median declared amount of 100 mg of elemental magnesium per serving; each row opens the label's own arithmetic.
measured| Label | Declared per serving | Salt | Capsule verdict |
|---|---|---|---|
| Jarrow Formulas Magnesium Optimizer | 100 mg | not resolved | not computable |
Source · NIH DSLD labels · snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method