Gut Microbiome & UPF Impacts on Metabolism & Brain

8 key bacteria/30 plants/ferments for butyrate; UPF linked to lower attention/dementia even on Med diet. 7 harmful UPF categories named in AHA/EHJ coverage; whole-food focus reduces inflammation. New: Michael Pollan explains engineered cravings—willpower not the issue, food environment key; practical takeaway: cook more, eat 30 plants/week. Gastroenterologist's simple fiber-boosting trick ('cut it with kale') to easily increase fiber intake.