NutriSTAT Complete Diagnostic Reference Guide

What This Guide Covers

The most common error in functional medicine isn't ordering the wrong labs. It's treating individual analytes without a diagnosis. A patient with elevated homocysteine doesn't have a "high homocysteine problem" — they have one of a dozen possible root causes, from B12 or folate deficiency to MTHFR variants, hypothyroidism, or PPI use. Reach for methylfolate before identifying which one applies, and you delay the intervention that would have actually worked. This pattern, what Dr. Lundell calls analyte chasing, leads to polypharmacy, patient overwhelm, and therapeutic failure, because the number on the page was never the diagnosis. It was a clue.

This guide gives you a structured way to work through that process for 242 analytes across 12 panels: metabolic, renal, liver, iron, vitamins, thyroid, hormones, minerals, metals, essential fatty acids, amino acids, organic acids, and toxicant/microbial markers. For each one, you get the optimal range (narrower than the standard lab range, set at the 20th–80th percentile of the reference population), a clear elevated/decreased differential, a functional medicine correlation, and nutraceutical considerations tied to root cause; not to the value in isolation. You'll be able to look at a panel of abnormal values and group them into a pattern before you reach for a single supplement.