The Gut-Brain Axis: Signal, Hype, and the Gap Between
The anatomy is uncontested and the human trial evidence is thinner than the headlines. Here is where each part of the claim actually stands.
Tag
microbiome
At-Home Stool Tests: Which Ones Have Been Validated
Some mail-in stool tests carry national screening recommendations and published accuracy data. Others were measured against a reference material and disagreed with each other.