Synbiotics pair two parts that support each other. A prebiotic is a specific fiber or substrate that beneficial bacteria can use. A probiotic provides live microbes that may help balance the gut ecosystem.
The prebiotic can act like “food” soon after you take them. That may help the probiotic microbes survive, grow, and produce helpful compounds in the gut. This is especially relevant when conditions in the gut limit bacterial growth.
In the gut, these changes can influence how microbes break down food. That can affect digestion comfort, gas and stool patterns, and the types of microbes that become more common over time.