# The Metabolic Labs Worth Requesting (2026)

> Decision-grade lab roundup: glycemic criteria, HOMA-IR context, ApoB, iron studies, hs-CRP, and foundational CMP/TSH—without wellness panel maximalism.

*Published 2026-07-10 · Updated 2026-07-10 · By Marcus Chen*

*Medical disclaimer:* Educational only—not a personal order set or diagnosis. Interpret labs with a licensed clinician.

The short answer

Start with **A1C and glucose (OGTT when indicated)**, add **fasting insulin** for HOMA-IR context, refine lipids with **ApoB**, and never read **ferritin** without iron-context tests like TSAT when overload is the question. See [ADA diagnosis criteria](https://diabetes.org/about-diabetes/diagnosis) and our [HOMA-IR explainer](https://healthcanon.com/metabolic-health/homa-ir-explained).

Boutique panels are optional after fundamentals. Numbers without decisions are expensive souvenirs.

## How to use this list

Bring questions to a clinician; do not self-diagnose from a single cutoff. Confirm abnormal results when standards require it.

## Sources

1. [ADA diabetes diagnosis](https://diabetes.org/about-diabetes/diagnosis)
2. [Matthews HOMA 1985](https://pubmed.ncbi.nlm.nih.gov/3899825/)
3. [CDC hemochromatosis](https://www.cdc.gov/hemochromatosis/about/index.html)

---
Source: https://healthcanon.com/metabolic-health/best-metabolic-labs-to-request-2026
Index: https://healthcanon.com/llms.txt · Full text: https://healthcanon.com/llms-full.txt