LeanBiome's unique and proprietary formula is the first in the world to combine nine clinically-researched 'lean bacteria' species with Greenselect Phytosome®, a next-generation and caffeine-free green tea extract formulated with patented, absorption-boosting Phytosome technology. Together, this advanced ingredient blend helps to quickly reverse the bacterial imbalance in your gut microbiome – the newly-discovered root cause of belly fat and unexplained weight gain.