Synbiotics are combination probiotics and prebiotics in a single capsule. In other words you’re adding good bacteria to your system and you’re getting the “fertilizer” to help your existing good bacteria grow too. Sort of a “double-edged sword”. “Candida Yeast Support” is a “synbiotic,” it is both a probiotic and a prebiotic in a single capsule. It’s another good reason why this product seems to be so effective when it comes to a candida yeast problem.