Label arithmetic · NIH DSLD 216334
Carlson Magnesium Gels 400 mg: 400 mg of magnesium per softgel, 1 softgel a day, $7.63 a month
400 mg of magnesium per softgel; the label's 1 softgel a day cost $7.63 a month (Amazon, Nov 2). Inside: label lines, ingredients.
Carlson Magnesium Gels 400 mg was observed at $25.42 on 2026-11-02 for 100 servings of 400 mg elemental magnesium as oxide: $0.0636 per 100 mg, rank 5 of 5 ranked oxide offers (1 = lowest price per 100 mg), percentile 100 (lower = lower price) (median $0.0293, ranked prices observed 2026-10-26 to 2026-11-02). NIH DSLD 216334, label dated 2020-03-24.
computed from the filed label
Chart data
| Displayed chart text |
|---|
| gluconate |
| 6,826 |
| orotate |
| 5,502 |
| L-threonate |
| 4,848 |
| taurate |
| 4,484 |
| lactate |
| 3,331 |
| glycerophosphate |
| 3,200 |
| glycinate |
| 2,837 |
| malate |
| 2,574 |
| aspartate |
| 2,558 |
| citrate |
| 2,475 |
| sulfate |
| 1,981 |
| chloride |
| 1,567 |
| carbonate |
| 1,387 |
| hydroxide |
| 960 |
| oxide |
| 663 |
Data release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-11-02 · chemistry 2026-10-17
Mass: 663 mg per softgel · Price: $0.0636 per 100 mg · % DV: 95% vs 95%
Elemental: The magnesium itself; the rest of the compound weight is the partner molecule.
Compound: The whole salt, such as magnesium glycinate, that must physically fit in the capsule.
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; size 00 holds about 730 mg and size 0 about 545 mg.
Recompute with your price
Enter the price you paid; the declared amount and servings of this label are prefilled, so the result is the cost per 100 mg of elemental magnesium for your bottle.
Same-salt comparison appears here.
How much oxide compound is in one serving?
Carlson Magnesium Gels 400 mg carries 663 mg of magnesium oxide per serving for 400 mg of elemental magnesium, against 1,100 mg in the largest standard capsule; capsule capacities do not apply to this softgel capsule.
computed with assumption| Measure | Value |
|---|---|
| Elemental magnesium per serving | 400 mg |
| Units per serving | 1 |
| Magnesium oxide per serving | 663 mg |
| Magnesium oxide per softgel | 663 mg |
| Capsule capacity 0 · 00 · 000 | 545 · 730 · 1,100 mg |
| Verdict | Capsule sizes do not apply |
Source · NIH DSLD 216334 · label 2020-03-24; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Carlson Magnesium Gels 400 mg files 1 magnesium line in NIH DSLD 216334; the selected primary line declares 400 mg of elemental magnesium per serving, against 0 other rows excluded from the primary amount. A salt named under another nutrient does not turn that nutrient's quantity into elemental magnesium.
measured| Filed amount | Salt or note as filed | Role |
|---|---|---|
| 400 mg | oxide · Magnesium (Form: from Magnesium Oxide) | Primary serving |
Source · NIH DSLD 216334 · label 2020-03-24; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Does this label's oxide claim hold up, or could the magnesium come from another source?
The label names one magnesium form, oxide, resolved from the filed magnesium line; capsule capacities do not apply to this form, compared with oxide, the salt richest in magnesium at 60.3%.
computed with assumption| Form named on the label | Elemental fraction | Source |
|---|---|---|
| Magnesium oxide | 60.3% | filed magnesium line |
Source · NIH DSLD 216334 · label 2020-03-24; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Is this a good price for the elemental magnesium I'm actually getting?
Carlson Magnesium Gels 400 mg costs $0.0636 per 100 mg of elemental magnesium at the price observed 2026-11-02, rank 5 of 5 ranked oxide offers (1 = lowest price per 100 mg), percentile 100 (lower = lower price), against a same-salt median of $0.0293; prices observed 2026-10-26 to 2026-11-02. First observed 2026-08-10 at $25.42, latest 2026-11-02 at $25.42, 11 observations.
computed
Chart data
| Displayed chart text |
|---|
| n=5 |
| P25 $0.0258 |
| P75 $0.0356 |
| median $0.0293 |
| Rank | Label | Per 100 mg | Observed |
|---|---|---|---|
| 1 | Nutricost Magnesium Oxide | $0.0148 | 2026-11-02 |
| 2 | tnvitamins Magnesium Oxide 420 mg | $0.0258 | 2026-11-02 |
| 3 | Douglas Laboratories Magnesium Oxide | $0.0293 | 2026-11-02 |
| 4 | Wonder Labs Magnesium Oxide 400 | $0.0356 | 2026-11-02 |
| 5 | Carlson Magnesium Gels 400 mg | $0.0636 | 2026-11-02 |
| Median | 5 ranked oxide offers | $0.0293 | 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
How many days will this bottle last at the label's own serving, and what does a day cost?
At the label's own serving, Carlson Magnesium Gels 400 mg lasts 100 days: 100 servings against 1 serving a day in the filed directions. $7.63 a month at the label's suggested use (1 softgel a day) and $8.01 at the 420 mg Daily Value reference (21 CFR 101.9); arithmetic on the label, not intake advice.
computed| Measure | Value |
|---|---|
| Net contents as filed | 100 Softgel(s) |
| Serving size as filed | 1 Softgel(s) |
| Servings per container | 100 |
| Servings per day in the directions | 1 |
| Days per bottle | 100 days |
| Cost a month at the label suggested use | $7.63 a month at the label's suggested use (1 softgel a day) |
| $ per 30 days at 420 mg Daily Value | $8.01 |
Source · NIH DSLD 216334 · label 2020-03-24; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "95% Daily Value" mean here, and does it recompute?
The label declares 95% Daily Value; 400 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 95%, the same within one point.
computed| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 95% | 420 mg | 95% |
Source · NIH DSLD 216334; 21 CFR 101.9 · label 2020-03-24 · release 2026-08-10-f441aa9f · CSV · method
Why does this label contain these other ingredients, what shell is it, and who is it filed for?
Carlson Magnesium Gels 400 mg files 3 other ingredients, and no magnesium stearate, against 30 of 61 oxide labels that list magnesium stearate.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Sunflower Oil |
| 2 | Beeswax |
| 3 | Softgel Shell |
| Target group | Adult (18 - 50 Years) |
| Target group | Gluten Free |
| Target group | Dairy Free |
Source · NIH DSLD 216334 · label 2020-03-24; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What has research measured about oxide, and about side effects?
12 studies in the PubMed-checked registry measured outcomes involving oxide; 2 mention gastrointestinal or adverse outcomes. They measured the salt, not this label.
measured| Year | Study | PubMed |
|---|---|---|
| 2026 | Randomized, open-label study of the short-term pharmacokinetics of oral magnesium oxide in healthy volunteers. | 42091979 |
| 2024 | Comparative Clinical Study on Magnesium Absorption and Side Effects After Oral Intake of Microencapsulated Magnesium (MAGSHAPE™ Microcapsules) Versus Other Magnesium Sources. | 39770988 |
| 2022 | Effects of short-term magnesium supplementation on ionized, total magnesium and other relevant electrolytes levels. | 35041150 |
Source · PubMed-checked study registry · registry checked 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Has this brand had FDA recalls or adverse event reports?
Carlson has 3 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Carlson has FDA CAERS adverse event reports on record at brand level, as do 143 of 273 brands in this registry; 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-2157-2017 | 2017-05-03 | Product contains elevated levels of patulin. | Terminated |
| F-2158-2017 | 2017-05-03 | Product contains elevated levels of patulin. | Terminated |
| F-1253-2023 | 2023-07-26 | Product contains high levels of patulin (above 50ppb). | Terminated |
Source · openFDA enforcement and CAERS · queried 2026-10-19 · release 2026-08-10-f441aa9f · CSV · method
Is this the same formula as another brand's, and how do their prices differ?
No other brand files the same formulation (ingredients, shell, units and rounded amount) as of 2026-11-02.
computed| Label | Brand | Price per 100 mg |
|---|---|---|
| No cross-brand match as of 2026-11-02 |
Source · NIH DSLD 216334 · label 2020-03-24; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Which labels are closest to this one, with the same salt and dose?
5 labels use the same resolved oxide within ±10% of this label's 400 mg per unit, compared side by side on price and capsule verdict.
computed| Label | Elemental per unit | Price | Verdict |
|---|---|---|---|
| Finest Nutrition Magnesium 400 mg | 400 mg | No price | Capsule sizes do not apply |
| Nature Made High Potency Magnesium 400 mg | 400 mg | No price | Capsule sizes do not apply |
| Carlson Magnesium Gels 400 mg | 400 mg | No price | Capsule sizes do not apply |
| Nutricost Magnesium Oxide | 420 mg | $14.95 · 2026-11-02 | Needs size 00 |
| tnvitamins Magnesium Oxide 420 mg | 420 mg | $12.99 · 2026-11-02 | Needs size 00 |
Source · NIH DSLD 216334 · label 2020-03-24; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Where does this record come from, what is missing, and how do I cite or correct it?
Every value on this page traces to NIH DSLD 216334 (label 2020-03-24, snapshot 2026-08-10), a price observed 2026-11-02 and the chemistry model of 2026-09-13. 1 gap remain: Capacity audit excluded as of 2026-10-17: softgel volume is not modelled by hard capsule sizes 0/00/000.. The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 216334 |
| Label date | 2020-03-24 |
| Date entered into DSLD | 2020-03-24 |
| Barcode (UPC) as filed | 0 88395 05201 9 |
| Label version · Image difference, same product | NIH DSLD 54660 |
| Label version · Package size difference, same product | NIH DSLD 54662 |
| Label version · Package size difference, same product | NIH DSLD 216338 |
| Label version · Image difference, same product | NIH DSLD 337541 |
17 additional rows
| Field | As filed |
|---|---|
| Label version · Package size difference, same product | NIH DSLD 337541 |
| Label version · Package size difference, same product | NIH DSLD 54660 |
| Distributed by | Carlson Division of J.R. Carlson Laboratories, Inc., Arlington Heights, IL, USA |
| Claim category as filed | Nutrient |
| Claim category as filed | All Other |
| Claim category as filed | Structure/Function |
| FDA Statement of Identity | Dietary Supplement |
| Formulation re: Other | Promotes regularity Cardiovascular support Muscle function |
| Suggested/Recommended/Usage/Directions | Directions: Adults: take one soft gel daily at mealtime. |
| Storage | Keep bottle tightly closed. Store away from heat and moisture. |
| Formulation re: Other | Magnesium is an essential mineral that plays an important role in many body functions. Magnesium is responsible for a healthy heart rhythm, nervous system function, and the normal utilization of calcium and potassium. Magnesium may naturally help promote regular bowel elimination. |
| Formulation re: Does NOT Contain | Gluten-free Milk/Casein-free No artificial preservatives |
| FDA Disclaimer Statement | These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease. |
| Formulation re: Other | Potency & Quality Guaranteed |
| Formulation re: Other | An FDA Regulated Facility |
| Physical state | Softgel Capsule |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 216334 · label 2020-03-24; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
6 brand pages linked below contain magnesium labels from the NIH DSLD registry snapshot dated 2026-08-10.