You might find Tim Specter’s “The Diet Myth” interesting. He’s a geneticist specializing in twin studies who sort of stumbled into the role of the microbiome in

You might find Tim Specter’s “The Diet Myth” interesting. He’s a geneticist specializing in twin studies who sort of stumbled into the role of the microbiome in obesity. It’s been a while since I’ve read it but IIRC he points to pasteurizing as one of the contributors to America’s obesity compared to Europe.