Articles
Gut Health, Lab Testing and Practice Insights from RSN Institute

How to Start Running Functional Labs | State Laws & NPI

How to Start Running Functional Labs | State Laws & NPI

Rachel Scheer
Published on: 17/08/2026

Learn how to start running functional labs, understand state laws, get an NPI, choose lab providers, and stay within scope when working with clients.

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How to Read a Stool Test: A Practitioner's Guide to GI-MAP, Gut Zoomer, and Real Root-Cause Protocols

How to Read a Stool Test: A Practitioner's Guide to GI-MAP, Gut Zoomer, and Real Root-Cause Protocols

Rachel Scheer
Published on: 10/08/2026

Learn how to read GI-MAP, Gut Zoomer, and GI Effects stool tests, interpret key gut health markers, avoid common mistakes, and build better protocols.

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My Client's Labs Are Normal, But They Still Feel Terrible. What Is Missing?

My Client's Labs Are Normal, But They Still Feel Terrible. What Is Missing?

Rachel Scheer
Published on: 15/07/2026

Normal labs but persistent symptoms? Learn why standard testing misses dysfunction, which markers get overlooked, and how functional practitioners fill the gap.

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Do Clients Need Functional Testing, or Can They Just Guess With Supplements?

Do Clients Need Functional Testing, or Can They Just Guess With Supplements?

Rachel Scheer
Published on: 15/07/2026

Supplements without testing is guessing. Learn why functional testing turns symptom-chasing into clinical reasoning, with B12 as a working example.

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