A new study has shown that a vegan diet can positively transform the gut microbiome more than a vegetarian or meat-eating diet. The study analyzed data from over 21,000 participants in the UK, US, and Italy and found that vegans had higher levels of bacteria linked to fiber digestion, which play a crucial role in reducing inflammation, strengthening gut barriers, and supporting metabolic health. On the other hand, meat-eaters had bacteria associated with digesting meat, which have been linked to higher inflammation and poorer health outcomes. Vegetarians fell between these two extremes in terms of microbiome health.

The study's co-author, Professor Tim Spector, emphasized the importance of diet in shaping the gut microbiome and overall health. He stated that a plant-rich diet, particularly high in fruits and vegetables, leads to a healthier microbiome composition and better health outcomes in the long run. The study also found that vegans were more likely to have beneficial bacteria from soil in their gut, while diets high in animal products and processed foods tended to favor harmful compounds linked to heart disease.