Natural Flow 4X Magnesium Complex
Labdoor printed a lab panel for lot 12667, tested Feb 25, 2026. Every figure below is from that document.
Printed lab panel Retrieved Oct 23, 2026 7 public records
What this record tells you
Read Oct 23, 2026- Natural Flow 4X Magnesium Complex: potency at 122% of the label claim and metals under the limits its documents printed.
- The evidence score reads 50% of the rubric for this record (recency of independent measured results, independent source count, method transparency); 60 is the score on that part only, not a grade of the bottle.
What you can do
Each step opens to what to look for. Nothing here is a verdict on the bottle.
Match your bottle’s lotLot 12667
These figures are for lot 12667, tested Feb 25, 2026. If the lot on your bottle is different, they describe another batch: ask Natural Flow 4X for your lot’s certificate.
Ask Natural Flow 4X for the certificate of analysis5 things to ask for
- The lot number printed on your bottle, and the certificate of analysis for that lot
- Each active ingredient as measured, against the label claim, in the label’s unit
- Lead, arsenic, cadmium and mercury results, each with the limit the lab used
- The laboratory’s name, the test method and the test date
- Whether the laboratory is independent of the brand
A certificate the brand commissions is manufacturer-sourced; read it as the brand’s own document.
Compare with the magnesium bottles that have numbers3 bottles
- Legion Sucrosomial Magnesium: potency at 109% of the label claim and metals under the limits its documents printed.
- Rootcha Fully Reacted Magnesium & Zinc Complex: potency at 100% of the label claim and metals under the limits its documents printed.
- BioEmblem Triple Complex Magnesium: potency at 116% of the label claim and metals under the limits its documents printed.
What the lab printed
Each figure as its document printed it, in that document’s unit. Two documents that print the same digits in different units are two rows; nothing is averaged.
5 figures
Labdoor| Analyte | Result | Claim or limit | Document |
|---|---|---|---|
| Magnesium | 243.0 mg | Claim 200.0 mg | Review page |
| Lead | 0.03 μg/serving | USP Limit 5.0 μg/day | Review page |
| Arsenic | 0.01 μg/serving | USP Limit 15.0 μg/day | Review page |
| Mercury | Below LOQ | USP Limit 15.0 μg/day | Review page |
| Cadmium | Below LOQ | USP Limit 5.0 μg/day | Review page |
How the evidence score reads this record
Rubric-1 scores the published evidence, not the product. A part with nothing public is left unscored, never counted as zero.
Rubric-1
50% of the rubric could be scored- Evidence score
- 60
- Rubric coverage
- 50%
| Part of the rubric | Points | What it read |
|---|---|---|
| Recency of independent measured results | 20 of 20 | 24 months or newer |
| Independent source count | 6 of 15 | 1 organization |
| Quantitative concordance | Not scored | Displayed. No source-stated pass or fail. |
| Method transparency | 4 of 15 | Grade or third-party phrase, no method. |
| Certification | Not scored | Not listed or expired. |
| Failure and warning | Not scored | Enforcement scan not completed. |
Every public record
In reading order, each with the sentence that holds the figure, its link and the date we retrieved it.
7 records
- LabdoorMeasured resultArsenic: 0.01 μg/serving
Arsenic Found 0.01 μg/serving USP Limit 15.0 μg/day
labdoor.com/review/natural-flow-4x-magnesium-complex · retrieved Oct 23, 2026
- LabdoorMeasured resultCadmium: Below LOQ**
Cadmium Found Below LOQ** USP Limit 5.0 μg/day
labdoor.com/review/natural-flow-4x-magnesium-complex · retrieved Oct 23, 2026
- LabdoorMeasured resultLead: 0.03 μg/serving
Lead Found 0.03 μg/serving USP Limit 5.0 μg/day
labdoor.com/review/natural-flow-4x-magnesium-complex · retrieved Oct 23, 2026
- LabdoorMeasured resultMagnesium: 243.0 mg
Magnesium Found 243.0 mg Claimed 200.0 mg
labdoor.com/review/natural-flow-4x-magnesium-complex · retrieved Oct 23, 2026
- LabdoorMeasured resultMercury: Below LOQ**
Mercury Found Below LOQ** USP Limit 15.0 μg/day
labdoor.com/review/natural-flow-4x-magnesium-complex · retrieved Oct 23, 2026
- LabdoorGrade only
LABDOOR SCORE 99.9 of 100
labdoor.com/review/natural-flow-4x-magnesium-complex · retrieved Oct 23, 2026
- LabdoorGrade only
A+ Natural Flow 4X Magnesium Complex
labdoor.com/rankings/magnesium · retrieved Oct 23, 2026
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- Next in this topicBioEmblem Triple Complex Magnesium: public test recordsBioEmblem Triple Complex Magnesium: potency at 116% of the label claim and metals under the limits its documents printed.
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