Ede is a Harvard-trained, board-certified psychiatrist. She earned her MD at the University of Vermont and completed her residency in general adult psychiatry at Cambridge Hospital, a Harvard teaching hospital. Seven years as a staff psychopharmacologist at Harvard University Health Services followed, then five years as psychiatrist to Smith College — in both roles the first psychiatrist there to offer nutrition-based approaches alongside or instead of medication. Since 2019 her clinical work has been nutrition and metabolic intervention only. She developed the first medically accredited clinician training course in ketogenic diets for mental health, co-authored the first inpatient study of the ketogenic diet for serious mental illness, and received the Baszucki Brain Research Fund's first Metabolic Mind Award. Change Your Diet, Change Your Mind, published by Balance in January 2024, became a bestseller and drew attention from the New York Times Book Review.

Her central mechanism is insulin resistance — a reduced ability of cells, brain cells included, to respond to insulin's signal to take up and burn glucose for energy. It doesn't require a diabetes diagnosis to cause damage, and it is largely silent: most people who have it don't know. The hippocampus, the brain's memory centre, is especially sensitive to the energy shortfall that follows. Ede connects this one mechanism to depression, anxiety, bipolar disorder, higher schizophrenia risk, and cognitive decline. The first half of the book works through why mainstream nutrition advice is unreliable and how to test for insulin resistance at home; the second half goes food group by food group, weighing risks and benefits, building toward what she calls the Quiet Diet — a plan personalised to the reader's own situation, landing anywhere from moderate-carbohydrate to fully ketogenic.

Every client takes blood glucose and ketone readings by finger-prick, morning and evening, once a week, and logs weight, waist, and sleep weekly. It is the same self-testing loop Ede describes, run on a weekly schedule. I have eaten the way she describes, in one form or another, for twelve years — long before I had her research to point to.

Read next to Palmer's Brain Energy, already reviewed here, the two books do different jobs. Palmer argues for one mechanism — mitochondrial dysfunction — sitting underneath most mental illness; Ede argues for a narrower, specific piece of that same territory and builds a plan a reader can run at home around it. Like Palmer, she sees the problem through the lens her own training gave her — a psychiatrist who found nutrition after years of psychopharmacology, arguing hardest for the mechanism she found. The underlying case for insulin resistance as a major, modifiable driver of mental health symptoms is well evidenced. It is an important piece of a larger picture — the same caveat worth holding onto with any single-mechanism book, hers included.