Marit Kolby
@MaritKolby
Food scientist and nutritional biologist. Nutrition science is complicated, but eating healthy is easy. Allow breaks from food and avoid the ultra-processed.
Did we get dietary saturated fats all wrong? The #HADLmodel provides a new understanding and an opportunity to get it right. THREAD👇👇👇 @simondankel @kariannesve academic.oup.com/ajcn/advance-a…
Good definition of UPF: "Evolutionarily novel", "industrial formulations manufactured by deconstructing foods into their component parts (such as oils, starches & sweeteners), modifying them (for example, through enzymatic processes) & recombining them with cosmetic additives"
Stumbled upon this piece I wrote a while ago. I think the answer has never been clearer. medium.com/@maritkolby/th…
"A simple bread replacement may not be sufficient to improve glucose homeostasis in individuals at risk of type 2 diabetes" Let me suggest _bread removal_, if improved glucose homeostasis is the goal. pubmed.ncbi.nlm.nih.gov/40571100/
Svært god kommentar som beskriver hvorfor regjeringens strategi mot desinformasjon bør skrotes.
10 eksempler på APs desinformasjon. Del gjerne! I regjeringens kamp mot desinformasjon regner vi med at de vil feie for egen dør først. Her er litt hjelp til å gjenkjenne desinformasjon i egne rekker: subjekt.no/2025/07/19/ti-…
Let me introduce the ultra-processing factor: the difference between processed and ultra-processed versions of the same foods. Does it matter for health? Can we claim it doesn't? Here, exemplified by breads. pubmed.ncbi.nlm.nih.gov/40647225/
Spent my morning reading this paper. It's highly recommended.
Hot off the press! Our new Nature Reviews Endocrinology paper, led by the brilliant Filippa Juul, takes a holistic look at UPF and obesity—combining historical, epidemiological, mechanistic & policy perspectives, plus a deep dive into biological mechanisms rdcu.be/ev8Fz
Do we need more nutrition podcasts at this point? Apparently. @TyRBeal has made a promising addition with his Ty Beal Show. I loved your conversation with @sguyenet 🙏
🎙️ Episode 1 is LIVE! Why is eating well so hard – even when we want to? Neuroscientist @sguyenet breaks down: 🏪 Why our food environment outpaced our biology 🧠 How certain foods hijack our brains 💊 What the data shows about Ozempic & GLP-1 drugs Apple:…
"Excessive UPF intake is significantly associated with an increased risk of female infertility" bmcpublichealth.biomedcentral.com/articles/10.11…
"The findings indicate that a reduction in saturated fats cannot be recommended at present to prevent cardiovascular diseases and mortality" pmc.ncbi.nlm.nih.gov/articles/PMC12…
In my crystal ball I see both anemia and non-anemic iron deficiency linked with ultra-processed diets. Because they create low grade inflammation. Low grade inflammation shuts down the functional iron supply via hepcidin (gut transfer) and ferritin (sequestering).

Not surprised. "Non-commercial actors framed obesity in biomedical, lifestyle and socioecological terms, whereas commercial actors exclusively framed obesity as an issue of individual choices and proposed behavioural change interventions" cambridge.org/core/journals/…
Emulsifiers are everywhere in industrial foods. They disrupt metabolism and gut homeostasis in animals. nature.com/articles/s4200…
Is plant protein better than animal protein for health? Not according to these data. cdnsciencepub.com/doi/10.1139/ap…
I would rephrase to "soda" instead of "sugary drinks", as the artificially sweetened drinks are just as bad. But yes. Soda has no place in sports. bmj.com/content/389/bm…
"While examination of the issues that the authors articulate will take time, they unveil a simple fact - eating whole foods is an achievable path to health now" True in 2020. Still true. pubmed.ncbi.nlm.nih.gov/32708552/
To solve the ill health epidemic caused by ultra-processed diets, we must return to the diets we ate prior to the epidemic of ultra-processed foods. Somehow, in nutrition science, this is considered a radical stance.
"Foods that predicted .. inflammation in children all belonged to the category of ultra-processed foods ... None of the minimally processed foods predicted inflammation" Hypotheses from this study can be tested. Meanwhile, children should eat less UPF. academia.edu/3067-1345/2/2/…
"Overall, it paints a devastating portrait of how our society has failed our children" foodpolitics.com/2025/05/the-ma…
"Samples from people with diets rich in ultra-processed foods were more likely to contain a metabolite linked to an increased risk of type-2 diabetes — and some of these people’s urine samples contained a molecule produced by certain food packaging" nature.com/articles/d4158…
UPF science is evolving. High-UPF diets show distinct blood & urine metabolomic profiles—matching known harms. Biomarkers may soon track UPF exposure & deepen our understanding of how UPFs cause disease. Yet policy action still lags. journals.plos.org/plosmedicine/a…