Lactobacillus casei is a well-researched gut bacterium you also get from fermented foods like yogurt and dairy drinks. Manufacturers add it to these products to help support digestive health.
People take L. Casei to maintain a stable community of gut microbes, particularly when antibiotics have disrupted that balance. It also helps promote regular bowel function and stimulates immune cell activity in the digestive tract, which supports the body's natural defenses.
You can get it from fermented foods or from capsules and powders. Take it with a meal to help more bacteria survive the trip through your stomach. Some strains need refrigeration, so follow the storage directions on the label.
People with seriously weakened immune systems, for example after an organ transplant or during chemotherapy, should speak with a doctor before using this probiotic. A little gas or bloating is possible when you first start taking it.