Too beautiful to be true? When a book promises that better food can help lift depression, skepticism is the reasonable first reaction. Yet “Bien manger pour ne plus déprimer” (Eat Well to Stop Being Depressed), by the French psychiatrist and researcher Guillaume Fond, is an excellent book.
Fond is a psychiatrist and researcher at the university hospitals of Marseille, and one of the few French specialists working specifically on psycho-nutrition, the study of how nutrition influences psychological and cognitive functions. His book takes a claim that sounds like a lifestyle magazine headline and subjects it to the discipline of clinical research.
Two routes from plate to brain
The core argument runs along two paths. The first is direct: the brain is an organ with high nutritional demands, and what we eat changes the raw materials it has to work with. The second is less obvious and more interesting: the trillions of bacteria in our gut, the microbiota, communicate with the brain through neural, immune, hormonal and metabolic channels, a system researchers call the gut-brain axis. Recent reviews describe this bidirectional network as a genuine regulator of mood, and disruptions in gut microbiota have been linked to the onset and worsening of depressive symptoms.
This is where probiotics enter the picture: microorganisms that can modulate the microbiota, and which Fond presents as a possible complement, not a replacement, to conventional treatment of depression and other psychiatric conditions. That framing matters. Nobody serious is suggesting you trade your prescription for salads.
The evidence is not just plausible, it is experimental
What separates this book from the usual nutrition books is that its claims trace back to published studies, which Fond analyses and, when needed, criticizes. The most famous is the SMILES trial, run in Australia by Felice Jacka and her team: a 12-week randomised controlled trial testing dietary improvement as an adjunctive treatment for moderate to severe depression. Participants who followed a modified Mediterranean-style diet, with nutritional counselling, showed significantly greater reduction in depressive symptoms than the control group, which received social support alone. It was the first intervention study to test better eating as a treatment strategy for depression, and it opened a field that has grown considerably since.
The Mediterranean pattern appears throughout the book, as it does throughout the literature: vegetables, legumes, olive oil, nuts, fish for those who eat it, and little ultra-processed food. Readers of this blog know I come at food from a plant-based angle, and the reassuring part is that the core of this pattern is easy to build without animal products: lentils, chickpeas, walnuts, whole grains and olive oil cover a lot of the ground.
Honesty about uncertainty is another strength. Fond flags which findings are solid and which remain obscure, a rare gesture in a genre that usually prefers certainty to nuance. Some conclusions will be refined as research progresses; the author says so himself.
A book designed to be read twice
One design choice deserves mention. The book runs on two font size levels: general-audience content in normal size, and deeper technical material in small print for readers who want the full scientific detail. You can read it as a practical guide or as a mini-textbook, or both, at your own pace.
The annexes are genuinely useful rather than decorative: a questionnaire for tracking your own diet, a glycemic index table for many common foods, and a ranking of the top 100 foods by protein-to-calorie ratio. Across nearly 300 pages, the tone stays serious, practical and readable, and I read it with real pleasure.
Should you read it?
If you manage depression, this is a complement to discuss with your doctor, never a substitute for treatment; if you are simply curious about how food shapes mood, it is probably the most rigorous introduction in French on the subject. Either way, the takeaway is modest and liberating: you do not need a perfect diet, just a better one, and your gut will notice before your scale does.
Do you think what we eat changes how we feel, or is that still too good to be true?
This post is informational and not medical advice. If you are struggling with depression, please speak with a health professional.
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