A highly refined form of Stevia plant extract also known as Reb A
A 2019 study reported a potential link between nonnutritive sweeteners, including stevia, and disruption in beneficial gut bacteria. This study also found they may induce glucose intolerance and metabolic disorders, similar to how sugar does.
Sweeteners from plants--with emphasis on Stevia rebaudiana (Bertoni) and Siraitia grosvenorii (Swingle)https://pubmed.ncbi.nlm.nih.gov/23341001/
Low-Dose Stevia (Rebaudioside A) Consumption Perturbs Gut Microbiota and the Mesolimbic Dopamine Reward Systemhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC6627124/