Prebiotics are the fibres that feed your good gut bacteria, probiotics are the live beneficial microbes themselves, and postbiotics are the helpful compounds those microbes produce once they’re well-fed. Together, they support digestion, immune function, gut lining integrity and inflammation balance. Antibiotics, while sometimes essential, can disrupt this ecosystem by reducing both good and bad bacteria, which is why supporting the gut with prebiotic- and probiotic-rich foods before and after antibiotics can help restore balance.