L. Acidophilus is a beneficial bacterium. It lives naturally in the human gut and appears in fermented foods like yogurt. This strain is among the most researched probiotics.
People take it to keep gut flora in balance, support regular digestion, and reinforce natural immune defenses. Many use it during or after a course of antibiotics to help repopulate gut bacteria.
Formulas come as capsules, tablets, or powders. Taking it with a meal helps it survive stomach acid. Some products need refrigeration to stay potent.
It can cause mild gas or bloating at first. Anyone with a compromised immune system or a serious health condition should speak with a healthcare professional before starting.