Label arithmetic · NIH DSLD 315680
Double Wood Supplements Magnesium Malate 1500 mg: the label lists 1,500 mg, salt or magnesium?
The label lists 1,500 mg; if that is malate weight, it holds 189–233 mg of magnesium. No US price matched (Nov 2). Inside: salt weight, capsule size.
Double Wood Supplements Magnesium Malate 1500 mg declares magnesium without one determinable amount per 3 capsule(s); Capacity audit excluded as of 2026-10-17: the filed amount may describe compound mass rather than elemental magnesium; the elemental amount is unresolved., as of 2026-11-02. No US retail price matched as of 2026-11-02; 2 of the 20 malate labels in this registry have a matched price. NIH DSLD 315680, label dated 2024-07-25.
as filedData release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-10-19 · chemistry 2026-10-17
Mass: not computable · Price: none matched · % DV: not declared
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.
Will the declared mg of malate actually fit in one capsule, or do I need more than one?
The compound mass behind this label cannot be computed as of 2026-11-02: Capacity audit excluded as of 2026-10-17: the filed amount may describe compound mass rather than elemental magnesium; the elemental amount is unresolved.. The filed amounts are listed in the next block. No lower bound: Capacity audit excluded as of 2026-10-17: the filed amount may describe compound mass rather than elemental magnesium; the elemental amount is unresolved..
computed with assumption| Measure | Value |
|---|---|
| Elemental magnesium per serving | Not one amount as of 2026-11-02 |
| Units per serving | 3 |
| Magnesium malate per serving | Not computable as of 2026-11-02 |
| Magnesium malate per capsule | Not computable as of 2026-11-02 |
| Capsule capacity 0 · 00 · 000 | 545 · 730 · 1,100 mg |
| Verdict | Not computable as of 2026-11-02 |
The filed salt can have more than one hydration state (anhydrous 15.54% or dihydrate 12.63% (192.41 g/mol)), so the compound mass is a range.
Source · NIH DSLD 315680 · label 2024-07-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Does the label's own text add up on magnesium?
The label's own text says “15% elemental magnesium by weight”: 225 mg of magnesium from 1,500 mg of magnesium malate is 15.0% magnesium, against the 12.6–15.5% that magnesium malate can carry, so the label's numbers agree with its salt.
computed| Measure | Value |
|---|---|
| Label text (NIH DSLD statements) | 15% elemental magnesium by weight |
| Implied magnesium share | 15.0% |
| Most magnesium malate can carry | 15.5% |
Source · NIH DSLD 315680 label text · snapshot 2026-08-10; salt fractions from the chemistry model · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Double Wood Supplements Magnesium Malate 1500 mg files 1 magnesium line in NIH DSLD 315680; the selected primary line declares no single elemental amount, 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.
computed with assumption| Filed amount | Salt or note as filed | Role |
|---|---|---|
| 1,500 mg | providing | Primary serving |
If 1,500 mg were the compound mass rather than the element, the elemental amount would be about 233 mg (15.5% of it), computed with a stated assumption.
Source · NIH DSLD 315680 · label 2024-07-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Does this label's malate claim hold up, or could the magnesium come from another source?
The label names one magnesium form, malate, resolved from the full NIH DSLD record text; 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 malate | 12.6–15.5% | full NIH DSLD record text |
Source · NIH DSLD 315680 · label 2024-07-25; 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; 2 of 20 malate labels have one, against a median of $0.1052 per 100 mg among 4 ranked malate offers.
computed
Chart data
| Displayed chart text |
|---|
| n=4, band unstable |
| P25 $0.0739 |
| P75 $0.1402 |
| median $0.1052 |
| Rank | Label | Per 100 mg | Observed |
|---|---|---|---|
| 1 | Seeking Health Magnesium Malate 500 mg | $0.0460 | 2026-11-02 |
| 2 | BulkSupplements.com Magnesium Malate Capsules 400 mg | $0.0832 | 2026-11-02 |
| 3 | Trace Minerals Research Stress-X Magnesium Powder Lemon Lime | $0.1272 | 2026-11-02 |
| 4 | Thorne Calcium-Magnesium Malate | $0.1792 | 2026-11-02 |
| Median | 4 ranked malate offers | $0.1052 | 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, Double Wood Supplements Magnesium Malate 1500 mg lasts 47–140 days: 140 servings against 1–3 servings a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 420 Capsule(s) |
| Serving size as filed | 3 Capsule(s) |
| Servings per container | 140 |
| Servings per day in the directions | 1–3 |
| Days per bottle | 47–140 days |
| $ 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 315680 · label 2024-07-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "percent Daily Value" mean here, and does it recompute?
The label does not declare a percent Daily Value for magnesium as of 2026-11-02.
computed| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| No declaration as of 2026-11-02 |
Source · NIH DSLD 315680; 21 CFR 101.9 · label 2024-07-25 · 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?
Double Wood Supplements Magnesium Malate 1500 mg files 2 other ingredients and a vegetarian shell, and no magnesium stearate, against 12 of 20 malate labels that list magnesium stearate.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Hypromellose |
| 2 | Microcrystalline Cellulose |
| Shell | vegetarian |
| Target group | Adult (18 - 50 Years) |
| Target group | Women (not pregnant or lactating) |
| Target group | Gluten Free |
Source · NIH DSLD 315680 · label 2024-07-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What has research measured about malate, and about side effects?
3 studies in the PubMed-checked registry measured outcomes involving malate; none reports a gastrointestinal outcome as of 2026-11-02. They measured the salt, not this label.
measured| Year | Study | PubMed |
|---|---|---|
| 2020 | Dose-Dependent Absorption Profile of Different Magnesium Compounds | 30761462 |
| 2019 | Timeline (Bioavailability) of Magnesium Compounds in Hours: Which Magnesium Compound Works Best? | 29679349 |
| 2018 | Scottsdale Magnesium Study: Absorption, Cellular Uptake, and Clinical Effectiveness of a Timed-Release Magnesium Supplement in a Standard Adult Clinical Population. | 29425476 |
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?
Double Wood Supplements has 0 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Double Wood Supplements 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 |
|---|---|---|---|
| No recall record as of 2026-10-19 |
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 315680 · label 2024-07-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Which labels are closest to this one, with the same salt and dose?
No other label files the same resolved salt within ±10% of this label's dose per unit as of 2026-11-02.
computed| Label | Elemental per unit | Price | Verdict |
|---|---|---|---|
| No neighbour as of 2026-11-02 |
Source · NIH DSLD 315680 · label 2024-07-25; 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 315680 (label 2024-07-25, snapshot 2026-08-10) and the chemistry model of 2026-09-13. 2 gaps remain: Capacity audit excluded as of 2026-10-17: the filed amount may describe compound mass rather than elemental magnesium; the elemental amount is unresolved.; No US retail price matched as of 2026-11-02 (barcode X002FSEOMV). The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 315680 |
| Scanned label (PDF) | Label 315680 scan |
| Label date | 2024-07-25 |
| Date entered into DSLD | 2024-07-25 |
| Barcode (UPC) as filed | X002FSEOMV |
| Manufactured for | Double Wood LLC, Philadelphia, PA, United States |
| Claim category as filed | Nutrient |
| Claim category as filed | All Other |
18 additional rows
| Field | As filed |
|---|---|
| Claim category as filed | Structure/Function |
| Formula re: Contains | Product Info: Magnesium Malate is a type of magnesium supplement made by combining elemental magnesium with malic acid and contains 15% elemental magnesium by weight. |
| Suggested/Recommended/Usage/Directions | Suggested Use: Take 3 capsules per day, morning or night, with or without food. |
| Storage | Storage: Store in a cool, dark place. Do not freeze or expose to moisture or heat above room temperature. |
| Seals/Symbols | Proudly Manufactured in the USA |
| Formulation re: Does NOT Contain | Made with Non-GMO Ingredients Gluten Free |
| 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. |
| Formula re: Contains | Magnesium Malate 1500 mg per serving Bioavailable form of Magnesium |
| FDA Statement of Identity | Dietary Supplement |
| Precautions re: All Other | Warning: Consult your physician before use. |
| Precautions re: Pregnant or Nursing or Prescription Medications | Do not use Magnesium Malate if you are pregnant, nursing, or are under 18 years of age. |
| Precautions re: Children | Do not use Magnesium Malate if you are pregnant, nursing, or are under 18 years of age. |
| Precautions re: All Other | Discontinue use and consult your doctor immediately if any adverse reactions occur. |
| Precautions re: All Other | Do not use Magnesium Malate and operate heavy machinery until you know how it affects you. |
| Precautions re: Children | Keep out of reach of children. |
| Precautions re: All Other | Do not exceed 9 capsules per day. |
| Physical state | Capsule |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 315680 · label 2024-07-25; 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.