Brand · NIH DSLD snapshot 2026-08-10
Swanson magnesium supplements: 11 products in 5 forms, 40–630 mg of magnesium per serving
11 Swanson magnesium products in 5 forms, led by citrate (3); median 313 mg of magnesium per serving. Inside: each product's mg and price.
Swanson files 11 on-market magnesium labels in NIH DSLD using 5 salts, most often citrate (2 of 11); 0 of 4 audited capsule labels are above the assumed size 000 capacity at powder density 0.8 g/mL, against 8 of 137 across the registry. Median declared amount 313 mg per serving; 1 of 11 labels has a matched US price as of 2026-11-02. Snapshot 2026-08-10.
computed from filed labels
Chart data
| Displayed chart text |
|---|
| citrate |
| 2 |
| oxide |
| 1 |
| aspartate |
| lactate |
| orotate |
Data 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
0 of 4 audited capsule labels are above the assumed size 000 capacity at powder density 0.8 g/mL, against 8 of 137 across the registry. 3 fit size 0 or 00 and 1 need size 000, at powder density 0.8 g/mL, the top of the usual 0.6–0.8 range and the most favourable hydration.
computed with assumption
Chart data
| Displayed chart text |
|---|
| Swanson |
| fits 3 of 4 |
| needs 000 1 of 4 |
| exceeds 0 of 4 |
| all audited |
| fits 82 of 137 |
| needs 000 47 of 137 |
| exceeds 8 of 137 |
| Verdict | Swanson | All audited capsule labels |
|---|---|---|
| Fits size 0 or 00 | 3 of 4 | 82 of 137 |
| Needs size 000 | 1 of 4 | 47 of 137 |
| Exceeds size 000 | 0 of 4 | 8 of 137 |
Source · NIH DSLD labels; mass balance · recognized salt only; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Which magnesium salts does Swanson use, and how much compound does each need?
Swanson files 5 salts, most often citrate (2 of 11) across 11 labels; for 100 mg of magnesium the lightest of them needs 166 mg of compound against 1,376 mg for the heaviest.
computed| Salt | Labels | Elemental fraction | Compound per 100 mg Mg |
|---|---|---|---|
| citrate | 2 | 11.3–16.2% | 619–885 mg |
| oxide | 1 | 60.3% | 166 mg |
| aspartate | 1 | 7.5–15.6% | 639–1,335 mg |
| lactate | 1 | 10.2–12.0% | 833–981 mg |
| orotate | 1 | 7.3% | 1,376 mg |
Source · NIH DSLD labels · snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How do Swanson's prices compare within each salt?
1 of 11 Swanson labels has a matched US price as of 2026-11-02; each is compared with the median of its own salt, never across salts, per 100 mg of declared elemental magnesium.
computed| Label | Salt | Per 100 mg | Same-salt median | Observed |
|---|---|---|---|---|
| Swanson Magnesium Aspartate | aspartate | On review | none | 2026-09-11 |
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 Swanson?
The FDA enforcement data queried 2026-10-19 holds 6 recall records naming Swanson, 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-0705-2013 | 2012-11-28 | This is to inform you of a product recall involving 2 lots of Swanson Organic 100% Certified Organic Fennel Seed (SWF092). Some jars of fennel seeds have been found to contain small, red beetle-type insects. | Terminated |
| F-0220-2014 | 2013-11-27 | Swanson Health Products is recalling two lots of Swanson Premium Full Spectrum Black Cumin Seed (Nigella sativa) Dietary Supplement Capsules. The product was found to be mislabel. Bottles of Black Cumin Seed from these two lots numbers (199399 & 201359) have been found to contain White Cumin Seed (Cuminum cyminum). | Terminated |
| F-1936-2014 | 2014-05-21 | The contract manufacturer has notified Swanson Health Products that Swanson Full Spectrum Cilantro (Coriander) (SW1112) is subject to a recall due to a potential risk of salmonella contamination. | Terminated |
| F-2438-2014 | 2014-09-24 | Swanson Certified Organic Carob Powder, item number SWF115 is being recalled due to a potential risk of Salmonella contamination from a raw ingredient used in this product. | Terminated |
| F-1985-2018 | 2018-10-03 | Himalayan Crystal Salt may contain metal wire pieces. | Terminated |
| F-0867-2022 | 2022-03-23 | Dietary supplement may contain potential metal shavings greater than or equal to 7mm in length. | 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 Swanson's labels, and what do they declare?
9 of 11 Swanson labels list magnesium stearate, 7 use a gelatin shell and 2 a cellulose shell; 6 distinct filed declarations appear across them. Listed ingredients are filed names, not quantities.
measured| Filed entry | Labels |
|---|---|
| magnesium stearate | 9 of 11 |
| gelatin | 7 of 11 |
| rice flour | 5 of 11 |
| silicon dioxide | 3 of 11 |
| citric acid | 2 of 11 |
| hypromellose | 2 of 11 |
| carnauba wax | 1 of 11 |
| croscarmellose sodium | 1 of 11 |
6 additional rows
| Filed entry | Labels |
|---|---|
| Adult (18 - 50 Years) | 11 of 11 |
| Vegetarian | 2 of 11 |
| Children 4 or More Years of Age | 1 of 11 |
| Vegan | 1 of 11 |
| Gluten Free | 1 of 11 |
| Dairy Free | 1 of 11 |
Source · NIH DSLD labels · snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Which Swanson labels are on file, and what does each declare?
Swanson has 11 on-market labels in the NIH DSLD snapshot 2026-08-10, with a median declared amount of 313 mg of elemental magnesium per serving; each row opens the label's own arithmetic.
measured| Label | Declared per serving | Salt | Capsule verdict |
|---|---|---|---|
| Swanson Albion Magnesium & Calcium | 133 mg | not resolved | not computable |
| Swanson Magnesium 200 mg | 400 mg | oxide | fits 0 |
| Swanson Magnesium Aspartate | 133 mg | aspartate | needs 000 |
| Swanson Magnesium Citrate 225 mg Super Strength | 225 mg | citrate | not applicable |
| Swanson Magnesium Citrate Powder Unflavored | 630 mg | citrate | not applicable |
| Swanson Magnesium Lactate 84 mg | 84 mg | lactate | needs 00 |
| Swanson Magnesium Orotate 40 mg | 40 mg | orotate | needs 00 |
| Swanson Magnesium Watermelon | Not one amount | not resolved | not computable |
3 additional rows
| Label | Declared per serving | Salt | Capsule verdict |
|---|---|---|---|
| Swanson Triple Magnesium Complex 400 mg | 400 mg | not resolved | not computable |
| Swanson Triple Magnesium Complex 400 mg | 400 mg | not resolved | not computable |
| Swanson Triple Magnesium Complex 400 mg | 400 mg | not resolved | not computable |
Source · NIH DSLD labels · snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method