Label arithmetic · NIH DSLD 180223
Nature Made Magnesium 250 mg: 250 mg of magnesium per tablet, 1 tablet a day
250 mg of magnesium per tablet, 1 a day. No US price matched (Nov 2). Inside: salt weight, %DV check.
Nature Made Magnesium 250 mg declares 250 mg of elemental magnesium per serving as oxide, which means 414 mg of magnesium oxide pressed into 1 tablet, compared with 1,100 mg in the largest standard capsule; capsule verdicts do not apply to a tablet. 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 180223, label dated 2018-08-31.
computed from the filed label
Chart data
| Displayed chart text |
|---|
| gluconate |
| 4,266 |
| orotate |
| 3,439 |
| L-threonate |
| 3,030 |
| taurate |
| 2,803 |
| lactate |
| 2,082 |
| glycerophosphate |
| 2,000 |
| glycinate |
| 1,773 |
| malate |
| 1,609 |
| aspartate |
| 1,598 |
| citrate |
| 1,547 |
| sulfate |
| 1,238 |
| chloride |
| 979 |
| carbonate |
| 867 |
| hydroxide |
| 600 |
| oxide |
| 414 |
Data release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-10-19 · chemistry 2026-10-17
Mass: 414 mg per tablet · Price: none matched · % DV: 63% vs 60%
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 is pressed into one tablet?
Nature Made Magnesium 250 mg carries 414 mg of magnesium oxide per serving for 250 mg of elemental magnesium, against 1,100 mg in the largest standard capsule; capsule capacities do not apply to this tablet or pill.
computed with assumption| Measure | Value |
|---|---|
| Elemental magnesium per serving | 250 mg |
| Units per serving | 1 |
| Magnesium oxide per serving | 414 mg |
| Magnesium oxide per tablet | 414 mg |
| Capsule capacity 0 · 00 · 000 | 545 · 730 · 1,100 mg |
| Verdict | Capsule sizes do not apply |
Source · NIH DSLD 180223 · label 2018-08-31; 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 Magnesium 250 mg files 1 magnesium line in NIH DSLD 180223; the selected primary line declares 250 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 |
|---|---|---|
| 250 mg | oxide · Magnesium (Form: as Magnesium Oxide) | Primary serving |
Source · NIH DSLD 180223 · label 2018-08-31; 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 180223 · label 2018-08-31; 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 Magnesium 250 mg as of 2026-11-02: servings per container are not filed.
computed| Measure | Value |
|---|---|
| Net contents as filed | 120 Tablet(s) |
| Serving size as filed | 1 Tablet(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 180223 · label 2018-08-31; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "63% Daily Value" mean here, and does it recompute?
The label declares 63% Daily Value; 250 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 60%, a difference of 3 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 |
| 60 · 63 |
| Declared vs |
| recomputed % DV |
| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 63% | 420 mg | 60% |
Source · NIH DSLD 180223; 21 CFR 101.9 · label 2018-08-31 · release 2026-08-10-f441aa9f · CSV · method
Why does this label contain magnesium stearate, what shell is it, and who is it filed for?
Nature Made Magnesium 250 mg files 10 other ingredients, including magnesium stearate (reference fraction 4.1% magnesium; no quantity filed, so it is not added to the total) and a vegetarian shell, against 30 of 61 oxide labels that list magnesium stearate.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Cellulose Gel |
| 2 | Croscarmellose Sodium |
| 3 | Stearic Acid |
| 4 | Hypromellose |
| 5 | Magnesium Stearate |
| 6 | Silicon Dioxide |
| 7 | Color added |
| 8 | Polyethylene Glycol |
5 additional rows
| Entry | Filed ingredient or declaration |
|---|---|
| 9 | Triethyl Citrate |
| 10 | Polysorbate 80 |
| Shell | vegetarian |
| Target group | Adult (18 - 50 Years) |
| Target group | Gluten Free |
Source · NIH DSLD 180223 · label 2018-08-31; 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?
Same filed formulation as 2 other labels of this brand; no other brand files it as of 2026-11-02.
computed| Label | Brand | Price per 100 mg |
|---|---|---|
| No cross-brand match as of 2026-11-02 |
Source · NIH DSLD 180223 · label 2018-08-31; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Which labels are closest to this one, with the same salt and dose?
6 labels use the same resolved oxide within ±10% of this label's 250 mg per unit, compared side by side on price and capsule verdict.
computed| Label | Elemental per unit | Price | Verdict |
|---|---|---|---|
| Indiana Botanic Gardens Magnesium 250 mg | 250 mg | No price | Capsule sizes do not apply |
| Sundown Naturalist Magnesium 250 mg | 250 mg | No price | Capsule sizes do not apply |
| Finest Nutrition Magnesium 250 mg | 250 mg | No price | Capsule sizes do not apply |
| Nature's Bounty Magnesium 250 mg | 250 mg | No price | Capsule sizes do not apply |
| Vitamin World Magnesium 250 mg | 250 mg | No price | Capsule sizes do not apply |
| ShopRite Magnesium 250 mg | 250 mg | No price | Capsule sizes do not apply |
Source · NIH DSLD 180223 · label 2018-08-31; 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 180223 (label 2018-08-31, snapshot 2026-08-10) and the chemistry model of 2026-09-13. 2 gaps remain: No US retail price matched as of 2026-11-02 (barcode 0 31604 04078 9); 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 180223 |
| Label date | 2018-08-31 |
| Date entered into DSLD | 2018-08-31 |
| Barcode (UPC) as filed | 0 31604 04078 9 |
| Label version · Package size difference, same product | NIH DSLD 179534 |
| Label version · Package size difference, same product | NIH DSLD 9183 |
| Label version · Package size difference, same product | NIH DSLD 90379 |
| Label version · Package size difference, same product | NIH DSLD 271329 |
20 additional rows
| Field | As filed |
|---|---|
| Label version · Package size difference, same product | NIH DSLD 180442 |
| Label version · Package size difference, same product | NIH DSLD 179404 |
| Distributed by: | Nature Made Nutritional Products, Mission Hills, CA, U.S.A. |
| Claim category as filed | All Other |
| Claim category as filed | Structure/Function |
| General Statements: All Other Content | Everyday value |
| General: Product/Version Code | List No. 4078 L200 Cat. A806 5A004 |
| FDA Statement of Identity | Dietary Supplement |
| General Statements: All Other Content | Helps support nerve, muscle & heart function |
| General Statements: All Other Content | Magnesium also supports healthy bones and teeth, and is essential in converting food into cellular energy. |
| Formulation re: Does NOT Contain | Color derived from natural source - no synthetic dyes No artificial flavors No preservatives No yeast or starch Gluten free |
| Suggested/Recommended/Usage/Directions | Suggested use: Take one tablet daily with a meal. For easier swallowing, take with water before and during ingestion. |
| Storage | Keep bottle 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. |
| General Statements: All Other Content | Magnesium tablets are made to Nature Made’s guaranteed purity and potency standards. |
| 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 | Tablet or Pill |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 180223 · label 2018-08-31; 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.