Is Anthony Berthou a reliable nutritionist? A fact-checked profile

Daniel Platteau nutrition profiles science communication

Anthony Berthou, the name that keeps coming up in nutrition

If you take even a passing interest in healthy eating, you've probably already come across his name: Anthony Berthou appears as the go-to nutritionist for the Yuka app, author of a 700-plus-page tome compiling thousands of studies, a regular guest on France Inter or in Le Monde, and a lecturer at the École Polytechnique Fédérale de Lausanne (EPFL). Impressive credentials — but also grounds for caution: in a field where the title "nutritionist" isn't always a protected one and self-proclaimed experts abound, the question deserves to be asked plainly. So, Anthony Berthou: a serious authority or simply good communication? We checked, point by point, what's said about him.

A path that starts in elite sport

Anthony Berthou started out as an athlete: he was part of the French junior triathlon team. His competitive career ended fairly early for health reasons — his official website stays deliberately vague about the exact nature of those reasons, and we found no reliable source that clarifies the point further (a patient association for Lyme disease later invited him several times as a nutrition speaker, but nothing indicates he was ever affected by the disease himself — he appears there as an outside expert). It was this episode, whatever it was, that shifted him from a performance-focused view of nutrition to one centered on health in a broader sense.

Academically, his background is concrete and verifiable: a state diploma in dietetics and nutrition, supplemented by five years of medical school, a degree in nutrition engineering, a university diploma in evolutionary biology (Lyon), and another in micronutrition (Dijon Faculty of Pharmacy). That's a noticeably more substantial profile than the average "nutrition coach" who pops up on social media without any recognized medical or paramedical training.

A long-standing teacher, not a media one-hit wonder

He has been teaching since 1999 — which rules out the image of a media expert who appeared out of nowhere. Among his most cited engagements: a course on "global food challenges through 2050" at EPFL, one of Europe's most respected technical institutions. That an institution of this caliber invites him to speak on food sustainability is a mark of recognition that goes beyond the world of popular science communication.

Today, he heads La Nutrition Systémique, his own training organization for health, paramedical, and sports professionals, where he teaches his integrative approach — linking what's on the plate to ecology, sleep, stress, and physical activity rather than reducing it to calorie counting.

The name behind the Yuka app

This is probably what made Anthony Berthou best known to the general public: he has been Yuka's go-to nutritionist since the app's launch, as confirmed directly on his official website. Yuka helps millions of users decode the nutritional quality of the food and cosmetic products they scan on the shelf.

That role deserves nuance rather than uncritical praise: reducing a food to a score out of 100 and a color code necessarily simplifies a more complex nutritional reality. A traditional cheese or butter can end up rated "poor" because of its saturated fat or salt content, without that always reflecting the legitimate place these foods have in a balanced, enjoyable diet. A scientific advisor's role isn't to design the algorithm down to its technical details, but to validate its foundations — so nuance has its limits, however serious the person providing it.

Anthony Berthou is also behind an older, lesser-known tool: a nutritional diagnostic algorithm for health professionals, created in 2009, winner of the French Ministry of Research's national innovative companies competition. That tool gave rise to holiSané, now marketed under the name Companion.

Has he produced scientific literature? Yes, but not quite how you'd expect

This is the trickiest question to settle, and the one around which the most approximations circulate. Two answers, seemingly different, actually turn out not to contradict each other.

On one hand, Anthony Berthou is not an academic researcher in the strict sense: most of his written work consists of synthesis books for the general public and professionals, not original research articles published regularly in peer-reviewed journals. His most substantial book, the Traité de la pleine santé par l'alimentation durable (Dunod, 2023), claims to critically compile more than 10,000 scientific references — a considerable work of synthesis, but one that remains, by nature, a synthesis rather than the production of original data.

On the other hand, it would be inaccurate to say he has never contributed to a peer-reviewed scientific publication: we found and verified directly with the publisher a real study, published in 2026 in the journal Nutrients (indexed on PubMed), titled Digestive Vulnerability and Exercise Exposure as Correlates of Gastrointestinal Symptoms and Race Withdrawal in Endurance and Ultra-Endurance Athletes. Anthony Berthou appears as a co-author, affiliated with the "Santé & Nutrition" organization in Nantes. The study looks at the digestive issues that cause ultra-trail runners to drop out mid-race — a topic consistent with his expertise in sports nutrition.

In other words: he is not a regular producer of primary research, but he isn't entirely absent from it either. His main contribution remains that of a translator of sorts — someone who digests abundant scientific literature to make it usable by professionals and the general public, with, on occasion, direct involvement in the research itself.

A useful clarification for anyone wanting to verify this themselves: don't confuse Anthony Berthou, the nutritionist, with Antoine Berthou, an economist specializing in international trade whose work (on transaction costs, the euro, or trade sanctions) has strictly nothing to do with nutrition. The two names are similar enough to muddy a quick search.

His books, at a glance

His bibliography includes seven books, three of which are particularly representative of his different roles:

Traité de la pleine santé par l'alimentation durable (Dunod, 2023) — his flagship work, dense and well-documented, weaving together nutrition, ecology, and evolutionary biology.
Du bon sens dans notre assiette, co-written with Michelin-starred chef Thierry Marx (Actes Sud) — a bridge between nutrition and gastronomy.
Remettez du bon sens dans votre assiette: 41 préjugés déconstruits par un nutritionniste, co-written with François-Régis Gaudry, Philomène Lelay, and Jean-Baptiste Lucas (Actes Sud) — a more accessible format that dismantles nutrition myths one by one.

The fact that these books are published by recognized mainstream publishers (Dunod, Actes Sud), rather than self-published, is an additional editorial filter — without being a scientific guarantee in itself.

What speaks in his favor

His recognition doesn't rest on a single pillar, but on a cluster of converging factors: genuine, verifiable academic training, long-standing teaching at serious institutions, a scientific advisory role entrusted to him by a high-impact tech company (Yuka), reputable mainstream publishers, and — rare enough to be worth noting — occasional but real involvement in a peer-reviewed scientific publication.

On substance, his so-called "systemic" approach — refusing to reduce nutrition to counting macronutrients and instead linking it to sleep, stress, physical activity, and the environment — fits within a now widely recognized strand of research on overall health that emphasizes the multifactorial nature of chronic disease. This isn't a marketing fad; it's a reading that holds up scientifically, even if it calls for more nuance than a one-size-fits-all diet.

What to keep in mind

None of our research turned up any documented controversy, scandal, or accusation of quackery against him from reliable sources — which is reassuring in itself, without excusing anyone from applying a critical eye to any visible expert, him included.

A few legitimate points of caution nonetheless emerge from this investigation:

Simplification comes at a cost. His association with a mass-market tool like Yuka exposes him to the same pitfall as any simplified rating system: a fine scientific nuance can get lost in a color code.
The risk of food anxiety. Highly detailed talk about gut permeability, blood sugar spikes, or fat quality can, in people already prone to anxiety, feed a kind of obsession with "eating right" (orthorexia) — a risk inherent to any highly normative approach to nutrition, regardless of how rigorous the person delivering it is.
A real cost of access. Recommendations built around micronutrition — organic produce, quality fatty fish, targeted supplements — come with a price tag, which can make them hard to follow for part of the public.
A status worth restating. No nutritionist, however well-regarded, replaces individualized medical advice — a common-sense principle that vulnerable groups (pregnant women, children, people with chronic conditions) would do well to keep in mind.

These reservations aren't accusations: they're the questions worth asking of any figure in nutrition, however credible — and it's precisely because they were applied to Anthony Berthou without going easy on him, and turned up nothing disqualifying, that his profile comes out of this review looking, if anything, stronger.

Verdict

Based on what we were able to verify independently, Anthony Berthou is a nutrition professional whose qualifications, teaching experience, and institutional recognition are real and documented — which isn't so common in a field where self-proclaimed expertise remains widespread. He is not an academic researcher regularly producing original data, but a high-level science communicator, occasionally involved in genuine research work. For a non-specialist audience looking for solid footing in nutrition, he is a credible reference — provided that, as with any expert, you keep your own critical thinking close at hand.