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Study Finds Cooked Veggies Are Better For Your Gut Health Than Eating Them Raw

*Swaps out salad for soup.* - by Lucy Bode
  • 09 Oct 2019
Study Finds Cooked Veggies Are Better For Your Gut Health Than Eating Them Raw
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If you’ve been chomping on raw carrots to get your five-a-day fix, hold tight a tic: you’re probably doing yourself more harm than good. A new study has found that raw produce contains compounds that damage microorganisms in the gut, while cooking your food can alter this bacteria for the better.

Scientists out of the University of California San Francisco set out to explore how exposure to heat impacts the physical and chemical properties of food and, in turn, how this affects the delicate microbial environment in our intestines.

The team split mice into four groups and fed them different diets: raw meat, cooked meat, raw sweet potatoes or cooked sweet potatoes. While they found no difference in the microbiomes of the mice who ate raw vs cooked meat, there was a significant change between the two groups eating raw vs cooked sweet potato. Not only was the bacteria in their bodies completely different, but the diet had also determined whether certain genes were ‘on’ or ‘off’ and the metabolic products (aka, waste) they produced.

RELATED: Your Dishwashing Liquid Could Be Messing With Your Gut Health

vegan
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Intrigued by the findings, the team then replicated the same experiment with a variety of vegetables (e.g. white potatoes, corn, peas, carrots and beetroot) and got the same results.

“We were surprised to see that the differences were not only due to changing carbohydrate metabolism but also may be driven by the chemicals found in plants,” Dr Peter Turnbaugh, an associate professor of microbiology and immunology at UCSF and the study’s lead author explained. “To me, this really highlights the importance of considering the other components of our diet and how they impact gut bacteria.”

juice
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In an effort to see if the same microbial changes would occur in humans, researchers partnered up with a professional chef to prepare a raw and cooked menu. The participants stuck to each diet for three days before providing stool samples. Again, it was clear that the gut bacteria between the two groups were distinctively different.

“It was exciting to see that the impact of cooking we see in rodents is also relevant to humans, although interestingly, the specifics of how the microbiome was affected differed between the two species,” Dr Turnbaugh added. 

“We’re very interested in doing larger and longer intervention and observational studies in humans to understand the impact of longer-term dietary changes.”

RELATED: Could A Healthier Gut Be The Key To Greater Gym Gains?

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Lucy Bode
Lucy Bode
Lucy is Women Health’s digital editor, social media specialist and the go-to girl for all things holistic wellness. Her background as a journalist and passion for food, fitness and integrative medicine has led her to write for some of Australia’s leading publications over the course of her career.

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