Label arithmetic · NIH DSLD 338836
Signature Supplements Magnesium Complex: the label lists 150 mg, salt or magnesium?
50 servings filed for this label. Salt not resolved from the NIH record; no US price matched (Nov 2). Inside: label lines, ingredients.
Signature Supplements Magnesium Complex declares magnesium without one determinable amount per 2 capsule(s); the magnesium salt is not resolved from the filed record, 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. NIH DSLD 338836, label dated 2025-09-25.
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: 36% vs n/a%
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 magnesium 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 | 2 |
| Magnesium salt per serving | Not computable as of 2026-11-02 |
| Magnesium salt 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 |
Source · NIH DSLD 338836 · label 2025-09-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Signature Supplements Magnesium Complex files 5 magnesium lines in NIH DSLD 338836; 5 primary lines give 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.
measured| Filed amount | Salt or note as filed | Role |
|---|---|---|
| 150 mg | Salt not named in this row as of 2026-11-02 | Primary serving |
| 150 mg | Salt not named in this row as of 2026-11-02 | Primary serving |
| 200 mg | Salt not named in this row as of 2026-11-02 | Primary serving |
| 150 mg | Salt not named in this row as of 2026-11-02 | Primary serving |
| 200 mg | Salt not named in this row as of 2026-11-02 | Primary serving |
Source · NIH DSLD 338836 · label 2025-09-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Does this label's magnesium claim hold up, or could the magnesium come from another source?
No single magnesium salt is resolved from the filed record as of 2026-11-02, so the source of the declared magnesium cannot be checked against capsule capacity, compared with oxide, the salt richest in magnesium at 60.3%.
computed with assumption| Form named on the label | Elemental fraction | Source |
|---|---|---|
| No form named as of 2026-11-02 | No defined fraction | named on label |
Source · NIH DSLD 338836 · label 2025-09-25; 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, and without a resolved salt there is no same-salt comparison.
computed| Rank | Label | Per 100 mg | Observed |
|---|
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, Signature Supplements Magnesium Complex lasts 50 days: 50 servings against 1 serving a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 100 Capsule(s) |
| Serving size as filed | 2 Capsule(s) |
| Servings per container | 50 |
| Servings per day in the directions | 1 |
| Days per bottle | 50 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 338836 · label 2025-09-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "36% Daily Value" mean here, and does it recompute?
The label declares 36% Daily Value for "Adults and children 4 or more years of age", a group whose reference is not resolved as of 2026-11-02.
computed| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 36% | 420 mg | Not computable |
| Adults and children 4 or more years of age | 38% | 420 mg | Not computable |
| Adults and children 4 or more years of age | 42% | 420 mg | Not computable |
| Adults and children 4 or more years of age | 36% | 420 mg | Not computable |
| Adults and children 4 or more years of age | 42% | 420 mg | Not computable |
Source · NIH DSLD 338836; 21 CFR 101.9 · label 2025-09-25 · 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?
Signature Supplements Magnesium Complex files 2 other ingredients and a vegetarian shell.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Cellulose |
| 2 | Diatomaceous Earth |
| Shell | vegetarian |
| Target group | Adult (18 - 50 Years) |
| Target group | Gluten Free |
| Target group | Dairy Free |
| Target group | Sugar Free |
Source · NIH DSLD 338836 · label 2025-09-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What has research measured about this form, and about side effects?
No study in the registry measured an unresolved salt as of 2026-11-02.
measured| Year | Study | PubMed |
|---|
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?
Signature Supplements has 0 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Signature Supplements has no FDA CAERS adverse event report on record at brand level as of 2026-10-19 (143 of 273 brands in this registry have at least one CAERS report).
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 338836 · label 2025-09-25; 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 338836 · label 2025-09-25; 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 338836 (label 2025-09-25, snapshot 2026-08-10) and the chemistry model of 2026-09-13. 3 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; no barcode is filed; A single salt with a defined elemental fraction is unresolved as of 2026-11-02. The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 338836 |
| Scanned label (PDF) | Label 338836 scan |
| Label date | 2025-09-25 |
| Date entered into DSLD | 2025-09-25 |
| Barcode (UPC) as filed | Not filed as of 2026-11-02 |
| Manufactured for | Signature Supplements, San Clemente, CA |
| Claim category as filed | Nutrient |
| Claim category as filed | All Other |
11 additional rows
| Field | As filed |
|---|---|
| Claim category as filed | Structure/Function |
| Formulation re: Does NOT Contain | No: chemical fillers or binders, artificial coloring, artificial flavor, preservatives, yeast, corn, milk or milk derivatives, lactose, salt, sodium, soy, sugar, gluten, starch or wheat. |
| FDA Disclaimer Statement | This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. |
| Formulation re: Other | From a GMP facility |
| FDA Statement of Identity | Dietary Supplement |
| Formula re: Contains | Highly absorbable elemental magnesiums Consists of 5 forms of the most beneficial types of essential magnesium. All of these alkaline minerals collectively support healthy cardiovascular function, relaxation, improves sleep, muscle function, help manage stress and anxiety as well as building healthy bones. |
| Suggested/Recommended/Usage/Directions | Directions: For adults, two (2) capsules daily preferably before bed. |
| Precautions re: Pregnant or Nursing or Prescription Medications | Magnesium and other minerals can affect the absorption of many medications. Do not take this product within 2 hours of taking medications or follow the advice of your health care providers. Warning: Pregnant or lactating women should consult a doctor before using any product. Consult doctor before use if you have, or have had, kidney disease, if you are on a magnesium-restricted diet or if you are taking any medications or remedies such as those to treat high blood pressure, heart medications, muscle relaxants or diuretics. |
| Precautions re: All Other | Discontinue use and consult your doctor if any adverse reactions occur, such as gastrointestinal discomfort or low blood pressure. |
| Physical state | Capsule |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 338836 · label 2025-09-25; 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.