PHGG, GOS and lactulose (if you don't have SIBO) are relatively good prebiotics in my experience. However, the type of prebiotics you use should be tied to wha

PHGG, GOS and lactulose (if you don't have SIBO) are relatively good prebiotics in my experience. However, the type of prebiotics you use should be tied to what's going on in your microbiome. Some common ones, such as Inulin, can feed both good and bad bacteria (and good bacteria become bad if they overgrow).