--- title: "Meaning & Key Takeaway of: One group was given AF and then fed diets…" description: "\"“One group was given AF and then fed diets containing 20% protein. The second group was given the same level of AF and then fed diets containing only 5..." image: "https://sms4smile.com/quotes/i/8a4/t-colin-campbell-5387_food_one-group-was-given-af-and-then-fed-diet_1539927.jpg" --- # One group was given AF and then fed diets containing 20%… ![“One group was given AF and then fed diets containing 20% protein. The second group was given the same level of AF and then fed diets containing only 5% protein. Every single rat fed 20% protein got liver cancer or its precursor lesions, but not a single animal fed a 5% protein diet got liver…” quote by T. Colin Campbell](https://sms4smile.com/quotes/i/8a4/t-colin-campbell-5387_food_one-group-was-given-af-and-then-fed-diet_1539927.jpg) [Download](https://sms4smile.com/quotes/i/8a4/t-colin-campbell-5387_food_one-group-was-given-af-and-then-fed-diet_1539927.jpg) [Open image](https://sms4smile.com/quotes/i/8a4/t-colin-campbell-5387_food_one-group-was-given-af-and-then-fed-diet_1539927.jpg) > ““One group was given AF and then fed diets containing 20% protein. The second group was given the same level of AF and then fed diets containing only 5% protein. Every single rat fed 20% protein got liver cancer or its precursor lesions, but not a single animal fed a 5% protein diet got liver cancer or its precursor lesions. It was not a trivial difference; it was 100% versus 0%.”” [T. Colin Campbell](https://sms4smile.com/quotes/author/t-colin-campbell/) ## About This Quote This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation. High protein intake combined with a specific factor dramatically increased liver cancer incidence in rats, while low protein prevented it. **In simple terms:** Protein level with factor caused cancer; low protein prevented it. Key Takeaway Limit protein when risk factor present. Themes nutrition cancer research protein biology dietary risk Mood cautious analytical Type scientific educational When to use this quote - lab research - diet formulation - public health guidelines - risk assessment Key Concepts oncology nutritional biochemistry dose‑response protein‑cancer interaction Questions to Reflect On - How does protein intake affect cancer risk in humans? - What other dietary factors could modify this effect? A Different Perspective Results may not directly translate to humans; other variables could influence outcomes. ★ ★ ★ ★ ★ No ratings yet [Food](https://sms4smile.com/quotes/about/food/) ## Related quotes > [I had liver disease. 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However, I still managed to be a very plump child…](https://sms4smile.com/quotes/david-starkey/the-food-of-my-childhood-was-revolting-because-i-was-a-child-of/) [David Starkey](https://sms4smile.com/quotes/author/david-starkey/) > [Burdens and obstacles are the protein diet that builds the mass of experience in life.](https://sms4smile.com/quotes/jin-kazama/burdens-and-obstacles-are-the-protein-diet-that-builds-the-mass-of/) [Jin Kazama](https://sms4smile.com/quotes/author/jin-kazama/) > [While losing weight I followed a protein diet in which you take 500 calories a day and don't eat after 9 P. M.](https://sms4smile.com/quotes/satish-kaushik/while-losing-weight-i-followed-a-protein-diet-in-which-you-take-500/) [Satish Kaushik](https://sms4smile.com/quotes/author/satish-kaushik/) > [I work hard, I will tell you that. I do a very low carb, high protein diet. I do Tracy Anderson, I do Body…](https://sms4smile.com/quotes/molly-sims/i-work-hard-i-will-tell-you-that-i-do-a-very-low-carb-high-protein/) [Molly Sims](https://sms4smile.com/quotes/author/molly-sims/) > [I always ate healthy, but it wasn't scientific. Now it's a high-protein diet and no carbohydrates. I have more consistent energy, and I don't…](https://sms4smile.com/quotes/lindsey-vonn/i-always-ate-healthy-but-it-wasn-t-scientific-now-it-s-a-high-protein/) [Lindsey Vonn](https://sms4smile.com/quotes/author/lindsey-vonn/) > [“a high protein diet is not good for a young infant. The main task of making cows’ milk into an ‘infant formula’ is to…](https://sms4smile.com/quotes/gabrielle-palmer/a-high-protein-diet-is-not-good-for-a-young-infant-the-main-task-of/) [Gabrielle Palmer](https://sms4smile.com/quotes/author/gabrielle-palmer/) > [“Supplements and a low protein diet appear to be prolonging my life.”](https://sms4smile.com/quotes/steven-magee/supplements-and-a-low-protein-diet-appear-to-be-prolonging-my-life/) [Steven Magee](https://sms4smile.com/quotes/author/steven-magee/) > [If you want to look somewhat like The Situation, which is gonna be pretty hard, you need to get that protein in your diet.](https://sms4smile.com/quotes/the-situation/if-you-want-to-look-somewhat-like-the-situation-which-is-gonna-be/) [The Situation](https://sms4smile.com/quotes/author/the-situation/) > [“These findings—the contents of Part II of this book—show that heart disease, diabetes and obesity can be reversed by a healthy diet.”](https://sms4smile.com/quotes/t-colin-campbell/these-findings-the-contents-of-part-ii-of-this-book-show-that-heart/) [T. Colin Campbell](https://sms4smile.com/quotes/author/t-colin-campbell/) ## More by T. Colin Campbell > [“These findings—the contents of Part II of this book—show that heart disease, diabetes and obesity can be reversed by a healthy diet.”](https://sms4smile.com/quotes/t-colin-campbell/these-findings-the-contents-of-part-ii-of-this-book-show-that-heart/) [T. Colin Campbell](https://sms4smile.com/quotes/author/t-colin-campbell/) > [“Good health is about being able to fully enjoy the time we do have.”](https://sms4smile.com/quotes/t-colin-campbell/good-health-is-about-being-able-to-fully-enjoy-the-time-we-do-have/) [T. Colin Campbell](https://sms4smile.com/quotes/author/t-colin-campbell/) > [Perhaps it is a testament to the power of modern marketing savvy that an obese man with heart disease and high blood pressure became…](https://sms4smile.com/quotes/t-colin-campbell/perhaps-it-is-a-testament-to-the-power-of-modern-marketing-savvy-that/) [T. Colin Campbell](https://sms4smile.com/quotes/author/t-colin-campbell/) > [“The health care establishment is structured to profit from chemical and surgical intervention. Diet still takes the back seat to drugs and surgery. One…](https://sms4smile.com/quotes/t-colin-campbell/the-health-care-establishment-is-structured-to-profit-from-chemical/) [T. Colin Campbell](https://sms4smile.com/quotes/author/t-colin-campbell/) > [“Americans consume more cow’s milk and its products per person than most populations in the world. So Americans should have wonderfully strong bones, right?…](https://sms4smile.com/quotes/t-colin-campbell/americans-consume-more-cow-s-milk-and-its-products-per-person-than/) [T. Colin Campbell](https://sms4smile.com/quotes/author/t-colin-campbell/) > [“you want to eat bacon and eggs for breakfast and then take cholesterol-lowering medication, that’s your right. But if you want to truly take…](https://sms4smile.com/quotes/t-colin-campbell/you-want-to-eat-bacon-and-eggs-for-breakfast-and-then-take/) [T. Colin Campbell](https://sms4smile.com/quotes/author/t-colin-campbell/) > [“Genetic medicine is the ultimate reductionist fantasy.”](https://sms4smile.com/quotes/t-colin-campbell/genetic-medicine-is-the-ultimate-reductionist-fantasy/) [T. Colin Campbell](https://sms4smile.com/quotes/author/t-colin-campbell/) > [“In one study of ten countries,14 a higher consumption of calcium was associated with a higher—not lower—risk of bone fracture (Chart 10.3”](https://sms4smile.com/quotes/t-colin-campbell/in-one-study-of-ten-countries-14-a-higher-consumption-of-calcium-was/) [T. Colin Campbell](https://sms4smile.com/quotes/author/t-colin-campbell/) > [No chemical carcinogen is nearly so important in causing human cancer as animal protein.](https://sms4smile.com/quotes/t-colin-campbell/no-chemical-carcinogen-is-nearly-so-important-in-causing-human-cancer/) [T. Colin Campbell](https://sms4smile.com/quotes/author/t-colin-campbell/) > [ Casein \[the main protein found in dairy\], in fact, is the most 'relevant' chemical carcinogen ever identified; its cancer-producin g effects occur in animals… ](https://sms4smile.com/quotes/t-colin-campbell/casein-the-main-protein-found-in-dairy-in-fact-is-the-most-relevant/) [T. Colin Campbell](https://sms4smile.com/quotes/author/t-colin-campbell/) > [Everything in food works together to create health or disease.](https://sms4smile.com/quotes/t-colin-campbell/everything-in-food-works-together-to-create-health-or-disease/) [T. Colin Campbell](https://sms4smile.com/quotes/author/t-colin-campbell/) > [If you flip a coin three times and it lands on heads each time, it’s probably chance. If you flip it a hundred times…](https://sms4smile.com/quotes/t-colin-campbell/if-you-flip-a-coin-three-times-and-it-lands-on-heads-each-time-it-s/) [T. Colin Campbell](https://sms4smile.com/quotes/author/t-colin-campbell/) > [Everything in food works together to create health or disease. The more we think that a single chemical characterizes a whole food, the more…](https://sms4smile.com/quotes/t-colin-campbell/everything-in-food-works-together-to-create-health-or-disease-the/) [T. Colin Campbell](https://sms4smile.com/quotes/author/t-colin-campbell/) > [“We’ve discovered that cow’s milk protein at reasonable levels of intake markedly promotes experimental cancer growth, which is outside of the nutrition paradigm. We’ve…](https://sms4smile.com/quotes/t-colin-campbell/we-ve-discovered-that-cow-s-milk-protein-at-reasonable-levels-of/) [T. Colin Campbell](https://sms4smile.com/quotes/author/t-colin-campbell/) > [“The enjoyment of life, especially the second half of life, is greatly compromised if we can’t see, if we can’t think, if our kidneys…](https://sms4smile.com/quotes/t-colin-campbell/the-enjoyment-of-life-especially-the-second-half-of-life-is-greatly/) [T. Colin Campbell](https://sms4smile.com/quotes/author/t-colin-campbell/) [Explore all 100 T. Colin Campbell quotes ](https://sms4smile.com/quotes/author/t-colin-campbell/) ## More Food quotes > [On Sundays, that's my pig out day and I do the pizza and the beer.](https://sms4smile.com/quotes/victoria-silvstedt/on-sundays-that-s-my-pig-out-day-and-i-do-the-pizza-and-the-beer/) [Victoria Silvstedt](https://sms4smile.com/quotes/author/victoria-silvstedt/) > [Before Noah, men having only water to drink, could not find the truth. 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You do know that right?”](https://sms4smile.com/quotes/beth-ashworth/my-god-joseph-your-toasted-sandwiches-are-the-fucking-shit-you-do/) [Beth Ashworth](https://sms4smile.com/quotes/author/beth-ashworth/) > [I feel like I could eat the world raw.](https://sms4smile.com/quotes/madeline-miller/i-feel-like-i-could-eat-the-world-raw/) [Madeline Miller](https://sms4smile.com/quotes/author/madeline-miller/) > [To me, Caribbean food is about fresh, seasonal produce - using what's in season to create vibrant and great tasting food. The spicing is…](https://sms4smile.com/quotes/ainsley-harriott/to-me-caribbean-food-is-about-fresh-seasonal-produce-using-what-s-in/) [Ainsley Harriott](https://sms4smile.com/quotes/author/ainsley-harriott/) > [ “\[S\]ometimes, when you are a food person, the possible irrelevance of what you are doing doesn’t cross your mind until it’s too late. 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