Lactobacillus brevis is a lactic acid bacterium found in fermented foods like kimchi, sauerkraut, and pickles. You can also get it as a probiotic supplement.
People take it to help keep their gut microbiome in balance and support digestive health. Some limited evidence points to immune and oral health support, though the data is mixed.
Most users take a capsule or powder with a meal. Eating fermented foods works too. Stick with a consistent routine.
Healthy people tolerate it well. Anyone with a weakened immune system or serious illness should speak with a doctor before using any probiotic.