Linda

“In 2018, we took part in one of the largest ever population studies by combining the American Gut Project (run by Rob Knight) data from 8,000 people and our British Gut Project of 3,000 people, all of whom were self-paying citizen-scientists.12 We found the gut diversity of Americans to be slightly worse than the British, though both were bad compared to poorer countries. The main factor that predicted diversity was the number of different plant species you ate each week; diversity peaked when you ate at least thirty different types of plant. This may sound a lot but includes grains, nuts, seeds and herbs. The data showed that eating some meat was fine, as long as you also had a large diversity of plants, and showed no clear difference between vegans and vegetarians.”
― Tim Spector, The Diet Myth: The Real Science Behind What We Eat