Pediococcus acidilactici is a probiotic lactic acid bacterium. Supplement makers use it to help maintain a balanced gut microbiome and support immune function. Some strains may ease occasional digestive discomfort or promote upper respiratory health, though the evidence is still developing.
Take it as a capsule or powder, ideally with a meal to improve stomach survival. Follow the product label for daily dosing. Most people tolerate it well. Those with a severely weakened immune system or short bowel syndrome should consult a healthcare professional before use.