Aldosterone-renin ratio — lab reference
Screening cutoff depends on units, method, medications, potassium, and collection protocol.
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What’s searchable?Plasma free metanephrines — lab reference
How you sit or lie down for the sample, and stress during collection, can affect this result. Use the cutoff from the lab that ran your test.
Reduced glutathione (GSH) — lab reference
Ask your clinician to specify whole blood, RBC, plasma, or intracellular method. Preanalytic handling is critical.
Oxidized glutathione (GSSG) — lab reference
The test method and how the sample is protected after collection can affect this number.
GSH/GSSG ratio — lab reference
This ratio is useful only when both measurements were made using a reliable paired method.
Superoxide dismutase activity — lab reference
RBC, plasma, and cellular assays are not interchangeable.
Catalase activity — lab reference
The method can change the result; ask what clinical question the test is meant to answer and whether a repeat would help.
8-hydroxy-2-deoxyguanosine (8-OHdG) — lab reference
Urine/plasma method, creatinine correction, collection timing, and assay matter.
F2-isoprostanes — lab reference
Urine/plasma and mass-spec/immunoassay results are not interchangeable.
Oxidized LDL — lab reference
Ask your clinician to use exact laboratory interval. Clinical utility and treatment targets are not universally standardized.
Myeloperoxidase (MPO) — lab reference
Assay and indication-specific.
TMAO — lab reference
Diet, kidney function, microbiome, timing, and assay affect results.
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