Label arithmetic · NIH DSLD 209393
Nature Made High Potency Magnesium 400 mg: 400 mg of magnesium per softgel, 1 softgel a day
400 mg of magnesium per softgel, 1 a day. Softgel fill is not modelled (Oct 17); no US price matched (Nov 2). Inside: label lines, ingredients.
Nature Made High Potency Magnesium 400 mg declares 400 mg of elemental magnesium per serving as oxide, which means 663 mg of magnesium oxide compound in one 1 softgel(s), compared with 1,100 mg in the largest standard capsule; capsule verdicts do not apply to this softgel capsule. No US retail price matched as of 2026-11-02; 10 of the 61 oxide labels in this registry have a matched price. NIH DSLD 209393, label dated 2019-11-21.
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 2026-10-19 · chemistry 2026-10-17
Mass: 663 mg per softgel · Price: none matched · % DV: 100% 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?
Nature Made High Potency Magnesium 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 209393 · label 2019-11-21; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Nature Made High Potency Magnesium 400 mg files 1 magnesium line in NIH DSLD 209393; 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: as Magnesium Oxide) | Primary serving |
Source · NIH DSLD 209393 · label 2019-11-21; 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 209393 · label 2019-11-21; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Is this a good price for the elemental magnesium I'm actually getting?
No US retail price is matched to this label as of 2026-11-02; 10 of 61 oxide labels have one, against a median of $0.0293 per 100 mg among 5 ranked oxide offers.
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?
Days per bottle cannot be computed for Nature Made High Potency Magnesium 400 mg as of 2026-11-02: servings per container are not filed.
computed| Measure | Value |
|---|---|
| Net contents as filed | 60 Liquid Softgel(s) |
| Serving size as filed | 1 Softgel(s) |
| Servings per container | Not filed as of 2026-11-02 |
| Servings per day in the directions | 1 |
| Days per bottle | Not computable as of 2026-11-02 |
| $ per 30 days at one label serving a day | No ranked price as of 2026-11-02 |
| $ per 30 days at 420 mg Daily Value | No ranked price as of 2026-11-02 |
Source · NIH DSLD 209393 · label 2019-11-21; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "100% Daily Value" mean here, and does it recompute?
The label declares 100% Daily Value; 400 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 95%, a difference of 5 points. Labels filed under the earlier 400 mg reference, or with a different filing basis, show gaps of this kind.
computed
Chart data
| Displayed chart text |
|---|
| Declared vs recomputed % |
| DV |
| 95 · 100 |
| Declared vs |
| recomputed % DV |
| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 100% | 420 mg | 95% |
Source · NIH DSLD 209393; 21 CFR 101.9 · label 2019-11-21 · 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?
Nature Made High Potency Magnesium 400 mg files 7 other ingredients and a gelatin shell, and no magnesium stearate, against 30 of 61 oxide labels that list magnesium stearate.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Medium Chain Triglycerides |
| 2 | Gelatin |
| 3 | Glycerin |
| 4 | Water |
| 5 | Soy Lecithin |
| 6 | Colors added |
| 7 | yellow Beeswax |
| Shell | gelatin |
2 additional rows
| Entry | Filed ingredient or declaration |
|---|---|
| Target group | Adult (18 - 50 Years) |
| Target group | Gluten Free |
Source · NIH DSLD 209393 · label 2019-11-21; 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?
Nature Made has 20 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Nature Made 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-0186-2014 | 2013-11-27 | Pharmavite LLC is conducting a voluntary recall of all lots of its Nature Made Full Strength Mini Multivitamins (recently repackaged as "Multi" softgels, (Multi Complete, Multi for Her, Multi for Her 50+, Multi for Him, Multi Complete club size). because recent quality tests indicate that the Vitamins B1 and B12 are losing potency more rapidly than initially expected, and these products are not me | Terminated |
| F-0185-2014 | 2013-11-27 | Pharmavite LLC is conducting a voluntary recall of all lots of its Nature Made Full Strength Mini Multivitamins (recently repackaged as "Multi" softgels, (Multi Complete, Multi for Her, Multi for Her 50+, Multi for Him, Multi Complete club size). because recent quality tests indicate that the Vitamins B1 and B12 are losing potency more rapidly than initially expected, and these products are not me | Terminated |
| F-0187-2014 | 2013-11-27 | Pharmavite LLC is conducting a voluntary recall of all lots of its Nature Made Full Strength Mini Multivitamins (recently repackaged as "Multi" softgels, (Multi Complete, Multi for Her, Multi for Her 50+, Multi for Him, Multi Complete club size). because recent quality tests indicate that the Vitamins B1 and B12 are losing potency more rapidly than initially expected, and these products are not me | Terminated |
| F-0184-2014 | 2013-11-27 | Pharmavite LLC is conducting a voluntary recall of all lots of its Nature Made Full Strength Mini Multivitamins (recently repackaged as "Multi" softgels, (Multi Complete, Multi for Her, Multi for Her 50+, Multi for Him, Multi Complete club size). because recent quality tests indicate that the Vitamins B1 and B12 are losing potency more rapidly than initially expected, and these products are not me | Terminated |
| F-0779-2015 | 2015-01-21 | Possible contamination with Listeria monocytogenes. | 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 209393 · label 2019-11-21; 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 |
| Carlson Magnesium Gels 400 mg (DSLD 216334) | 400 mg | $25.42 · 2026-11-02 | Capsule sizes do not apply |
| Carlson Magnesium Gels 400 mg (DSLD 216338) | 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 209393 · label 2019-11-21; 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 209393 (label 2019-11-21, snapshot 2026-08-10) and the chemistry model of 2026-09-13. 3 gaps remain: Capacity audit excluded as of 2026-10-17: softgel volume is not modelled by hard capsule sizes 0/00/000.; No US retail price matched as of 2026-11-02; no barcode is filed; Servings per container are not filed as of 2026-11-02. The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 209393 |
| Label date | 2019-11-21 |
| Date entered into DSLD | 2019-11-21 |
| Barcode (UPC) as filed | Not filed as of 2026-11-02 |
| Label version · Package size difference, same product | NIH DSLD 179929 |
| Label version · Package size difference, same product | NIH DSLD 179652 |
| Label version · Package size difference, same product | NIH DSLD 116089 |
| Label version · Package size difference, same product | NIH DSLD 26640 |
22 additional rows
| Field | As filed |
|---|---|
| Label version · Image difference, same product | NIH DSLD 116089 |
| Label version · Image difference, same product | NIH DSLD 26640 |
| Distributed by | Nature Made Nutritional Products, Mission Hills, CA, U.S.A. |
| Claim category as filed | Nutrient |
| Claim category as filed | All Other |
| Claim category as filed | Structure/Function |
| Suggested/Recommended/Usage/Directions | One softgel daily |
| FDA Statement of Identity | Dietary Supplement |
| General Statements: All Other Content | Supports essential nerve, muscle & heart function |
| Formula re: Contains | Magnesium is also essential in the formation of bones and teeth and in converting blood sugar into energy |
| Formulation re: Does NOT Contain | Colors derived from natural sources - No synthetic dyes No artificial flavors No preservatives No yeast or starch Gluten free |
| Suggested/Recommended/Usage/Directions | Suggested use: Take one softgel daily, with a meal. |
| Storage | Keep bottles tightly closed. Store in a cool, dry place, out of reach of children. |
| Precautions re: Children | Store in a cool, dry place, out of reach of children. |
| Precautions re: All Other | Do not use if imprinted seal under cap is broken or missing. |
| Precautions re: Pregnant or Nursing or Prescription Medications | Caution: Consult a physician before use, if you have kidney disease or if you are taking prescription medications. |
| Formula re: Contains | Contains: Soy |
| Precautions re: Allergies | Contains: Soy |
| General Statements: All Other Content | Magnesium liquid softgels are made to Nature Made's guaranteed purity and potency standards. Valid only for U.S. and Puerto Rico residents. |
| FDA Disclaimer Statement | These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. |
| Physical state | Softgel Capsule |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 209393 · label 2019-11-21; 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.