Label arithmetic · NIH DSLD 313394
Isotonix Magnesium: 400 mg of magnesium per 6.6 gram, 45 servings
400 mg of magnesium in each 6.6 gram, about 45 servings per 10.6 Ounce. Salt not resolved from the NIH record. Inside: label lines, ingredients.
Isotonix Magnesium declares 400 mg of elemental magnesium per 6.6 gram(s) (2 capfuls); the magnesium salt is not resolved from the filed record, Single-salt capacity audit excluded as of 2026-10-17: one salt with a defined elemental fraction is not resolved., as of 2026-11-02. No US retail price matched as of 2026-11-02. NIH DSLD 313394, label dated 2024-06-20.
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: 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 magnesium compound powder is in one scoop?
The compound mass behind this label cannot be computed as of 2026-11-02: Single-salt capacity audit excluded as of 2026-10-17: one salt with a defined elemental fraction is not resolved.. The filed amounts are listed in the next block.
computed with assumption| Measure | Value |
|---|---|
| Elemental magnesium per serving | 400 mg |
| Units per serving | Not a discrete unit as of 2026-11-02 |
| Magnesium salt per serving | Not computable as of 2026-11-02 |
| Magnesium salt per serving | 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 313394 · label 2024-06-20; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Isotonix Magnesium files 1 magnesium line in NIH DSLD 313394; 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 | Salt not named in this row as of 2026-11-02 | Primary serving |
Source · NIH DSLD 313394 · label 2024-06-20; 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 313394 · label 2024-06-20; 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, Isotonix Magnesium lasts 45 days: 45 servings against 1 serving a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 10.6 Ounce(s); 300 Gram(s) |
| Serving size as filed | 6.6 Gram(s) (2 Capfuls) |
| Servings per container | 45 |
| Servings per day in the directions | 1 |
| Days per bottle | 45 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 313394 · label 2024-06-20; 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 313394; 21 CFR 101.9 · label 2024-06-20 · 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?
Isotonix Magnesium files 10 other ingredients.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Fructose |
| 2 | Malic Acid |
| 3 | Citric Acid |
| 4 | Orange juice powder |
| 5 | Orange flavor |
| 6 | Passion Fruit flavor |
| 7 | Silicon Dioxide |
| 8 | Rebaudioside A |
8 additional rows
| Entry | Filed ingredient or declaration |
|---|---|
| 9 | Lo Han Guo fruit extract |
| 10 | Stearic Acid |
| Target group | Vegan |
| Target group | Vegetarian |
| Target group | Adult (18 - 50 Years) |
| Target group | Women (not pregnant or lactating) |
| Target group | Gluten Free |
| Target group | Dairy Free |
Source · NIH DSLD 313394 · label 2024-06-20; 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?
Isotonix has 0 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Isotonix 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 313394 · label 2024-06-20; 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 313394 · label 2024-06-20; 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 313394 (label 2024-06-20, snapshot 2026-08-10) and the chemistry model of 2026-09-13. 3 gaps remain: Single-salt capacity audit excluded as of 2026-10-17: one salt with a defined elemental fraction is not resolved.; No US retail price matched as of 2026-11-02 (barcode 8 48570 00084 2); 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 313394 |
| Scanned label (PDF) | Label 313394 scan |
| Label date | 2024-06-20 |
| Date entered into DSLD | 2024-06-20 |
| Barcode (UPC) as filed | 8 48570 00084 2 |
| Label version · Image difference, same product | NIH DSLD 29565 |
| Label version · Image difference, same product | NIH DSLD 217906 |
| Label version · Image difference, same product | NIH DSLD 313393 |
19 additional rows
| Field | As filed |
|---|---|
| Label version · Image difference, same product | NIH DSLD 202726 |
| Manufactured for and Distributed by | Market America, Inc., Greensboro, NC, USA |
| Claim category as filed | All Other |
| Claim category as filed | Structure/Function |
| Formulation re: Other | Supports normal blood pressure Promotes head comfort Promotes optimal muscle health and comfort Supports a healthy sleep quality |
| Brand IP Statement(s) re: (c), (TM), (SM) | Isotonix The world's most advanced nutraceuticals |
| FDA Statement of Identity | An isotonic-capable Dietary Supplement |
| Suggested/Recommended/Usage/Directions | Directions for use: Pour 2 level, white bottle capfuls of powder into a cup. Add 4 fl oz/120 ml of water and stir. Alternatively, for improved magnesium absorption, mix 1 capful in the morning and 1 capful in the evening, each with 2 fl oz/60 ml of water and stir. Maximum absorption occurs when taken on an empty stomach. This product is isotonic only if the specified amounts of powder and water are used. |
| Precautions re: Pregnant or Nursing or Prescription Medications | Warning: If you are currently using any prescription drugs, have an ongoing medical condition, consult your healthcare provider before using this product. If you are pregnant or breastfeeding, do not use this product. |
| Precautions re: All Other | Magnesium should be used cautiously in individuals with reduced kidney function due to an increased risk of hypermagnesemia. Discontinue use and consult your healthcare provider if you experience diarrhea, abdominal cramping or discomfort. |
| Formulation re: Does NOT Contain | This vegan product contains no added wheat, soy, yeast, gluten, artificial flavor, starch, salt, preservatives or milk. |
| Precautions re: Children | Keep out of the reach of children. |
| Storage | Store in a cool, dry place. |
| Precautions re: All Other | Do not use if safety seal is broken or missing. Resale on third-party websites is strictly prohibited unless specifically authorized by Market America or its corporate affiliates. If barcodes are altered or you purchase this product from an unauthorized third-party website, the product is not guaranteed by Market America or its corporate affiliates. |
| 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. |
| Formulation re: Does NOT Contain | Gluten free |
| Formulation re: Vegetarian/Vegan | Vegan |
| Physical state | Powder |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 313394 · label 2024-06-20; 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.