A study at King's College London found that lean twins had a diverse gut microbiome with 'lean bacteria' species that suppress hunger, fire up the metabolism, and reduce fat storage. Overweight twins had 'fat bacteria' species that increase fat storage, fuel cravings, and ramp up hunger. Repopulating the gut with 'lean bacteria' leads to a healthy body. New studies have identified the most powerful 'lean bacteria' species t...