Purser Wellness approved rule
Unit: nmol/L
Male: Age/assay-specific
Female: Age/assay-specific
How to read this marker
Supine collection and stress control improve specificity; use exact lab cutoffs.
The wider testing context
Collection time, posture, fasting, stress, sleep, medications, kidney function, and dynamic testing often matter more than a single static interval.
Using this reference
This is the approved adult, nonpregnant baseline unless the rule explicitly states otherwise. Keep the performing laboratory’s reference interval separate from this Purser Wellness rule. Match units and review the specimen, method, timing, medicines and relevant clinical context before interpreting a result. These pages do not calculate a personal high/low status or prescribe treatment.
A question to bring to your visit
Which parts of the Plasma free metanephrines rule apply to my report’s method, units and collection conditions, and what other findings should we review alongside it?
Approved by Dr. Daniel Purser, MD · PW-LABS-1.0. The source laboratory’s interval remains separate.
Names you may see
Plasma free metanephrines