Week 12: African Diet Swap Study Flashcards
Second leading cause of cancer death in western countries.
Colon cancer
Who has higher risk for colon cancer in western countries? Why?
Lifestyle, socioeconomic circumstances (lower income, less quality healthcare, less likely to be screened)
Standard American diet
Processed and ultra processed foods
Meat and colon cancer
Red meat
processed meat
How might meat cause colon cancer?
soluble dietary fibre
Prebiotic and can be fermented by bacteria in the gut so gut bacteria release metabolites such as short chain fatty acids and produce beneficial vitamins such as vitamin K. Bacteria colon can produce B vitamins. Short t chain fatty acids feed colon cells
insoluble dietary fibre
Bulky and prevents constipation and hemorrhoids
Resistant starches have characteristics of both soluble and insoluble
Dietary fibre
non digestible carbohydrates from plant foods
Gut microbiota associated with the western diet
The food we eat in American diet are not good for the bacteria so have starved a lot of good bacteria by not feeding them the prebiotic starches. Western diet much less diverse and fewer species and many healthy gut bacteria may have gone instinct. Detriment to health. Short chain fatty acids contribute to immune function, and may reduce risk of colon cancer so bad when they can’t be produced by those bacteria. Diets high in refined carbs don’t feed the bacteria
Colon cancer risk on traditional African diet
premalignant colonic lesions - polyps
Precancerous growth which some have potential to grow into colon cancer which comes about from excess if they proliferate
Traditional African diet
colon cancer risk difference between African diet and western diet