Impact and Reviews¶

A free book only matters if it helps someone. This page keeps an honest, public record of who has checked the book, where it has been used, and what readers learned. Every entry is real and dated. Nothing is listed until it actually happens.

Why track this?

Vee thinking The same rule the Hype Meter uses for science applies to this book: a claim needs evidence. "This book helps people" is a claim, so this page collects the evidence.

Expert reviews¶

Reviews by physicians, researchers, and patient advocates, in the reviewers' own words and with their permission.

Date	Reviewer	Chapters reviewed	Changes made
	No outside reviews yet (October 2026). Reviewers are being invited.

Are you a clinician, researcher, or patient advocate? Offer a review. Corrections from reviews are listed on the Accuracy and Corrections page.

Community reviews¶

Chapter 13 (Autism, ADHD, and the Gut) will be reviewed by autistic and ADHD readers, and Chapter 19 (Culture, Food, Family, and Stigma) by families from the communities it describes.

Date	Group	Chapter	What changed
	None yet.

Where the book has been used¶

Classes, clubs, support groups, and families who used Gut Check, as reported through the classroom use form.

Date	Setting	Chapters used	Feedback
	None reported yet.

Pilot study results¶

Results from sessions that use the anonymous pre/post quiz in the Pilot Study Kit. A small, unblinded pre/post comparison can show whether readers' scores went up, but it can't prove the book caused the change.

Date	Setting	Participants	Average pre-quiz	Average post-quiz	Notes
	No pilot sessions yet.

Open resources others can reuse¶

Hype Meter claims dataset: every graded gut-brain claim in the book as JSON and CSV, free to reuse with credit.
Learning graph: 337 concepts and 538 prerequisite links, as CSV and JSON.
Printable PDFs, a teacher guide, a club kit, and a questions-to-ask-your-doctor printable.

Last updated: October 24, 2026.