Why this book
Jessie Inchauspé, a French biochemist who first started tracking her own blood sugar out of personal curiosity while working in genetics research, argues that glucose — the sugar molecule that enters the bloodstream after eating starchy or sweet foods — is an underappreciated lever behind everyday complaints most people never connect to diet: energy crashes, persistent cravings, brain fog, and mood swings. Her core claim is not that sugar itself is the enemy, but that the speed and size of the glucose spike a food produces matters more than whether that food contains sugar at all, and that simple, learnable adjustments — what she packages as ten "glucose hacks" — can blunt those spikes without requiring anyone to give up bread, dessert, or a favorite meal. The hacks include eating foods in a particular order (vegetables and protein before starches), pairing carbohydrates with fat, fiber, or protein rather than eating them alone, taking a short walk after eating, and starting the day with a savory rather than sugar-heavy breakfast.
Several of these hacks rest on genuinely reasonable, well-established nutritional logic — fiber and protein do slow carbohydrate absorption, and pairing macronutrients thoughtfully is standard dietary advice dressed in newer packaging. But it is worth being honest about where the book overreaches: independent nutrition scientists and dietitians who examined Inchauspé's cited evidence have found that many of her more dramatic numerical claims — a 75% reduction in glucose spike from eating order, a 30-40% reduction from a tablespoon of vinegar — rest on small studies, often with fewer than a dozen participants, frequently conducted in people who already have type 2 diabetes rather than the healthy general audience the book targets, and sometimes cited in ways critics describe as inflated or repeated to appear more numerous than they are. Reviewers have also raised concern that for people without diabetes, whose bodies already regulate normal post-meal glucose fluctuations without issue, the book's intense focus on "spikes" as inherently dangerous risks manufacturing anxiety around a healthy, unremarkable bodily process — and that Inchauspé's related supplement business creates a financial incentive that sits uneasily with her framing of the book's advice as purely evidence-based.
Who should read it
Readers who want an accessible, visually engaging entry point into how carbohydrates and meal composition affect energy and cravings, and who are open to treating the specific numbers as rough, motivating suggestions rather than precise clinical findings, will find real practical value here. It will frustrate readers seeking rigorous evidence-based nutrition science, anyone prone to food anxiety or disordered eating who doesn't need another reason to scrutinize every meal, and healthy readers without diabetes risk factors who don't actually need to worry about the ordinary blood sugar fluctuations the book treats as alarming.
About the author
Jessie Inchauspé holds a degree in mathematics from King's College London and a master's in biochemistry from Georgetown University. She worked in genetics research before founding the Glucose Goddess platform, and has since written a follow-up book, The Glucose Goddess Method; she does not hold formal credentials in medicine, nutrition, or endocrinology.