What it does: L. reuteri helps maintain a balanced gut microbiome by producing compounds that discourage the growth of certain harmful microorganisms and encourage the growth of other helpful bacteria, supporting digestive comfort and immune regulation.
How it is used: It is often taken to support regular digestion, ease occasional digestive discomfort such as gas or bloating, and reinforce gut health after disruptions like antibiotic use or illness.
Natural sources and supplement forms: L. reuteri exists naturally in the human gut but is rare in most foods. Supplements typically use isolated and cultivated strains delivered as capsules, chewables, or powders.
Why it appears in supplement formulas: This probiotic is included to help restore and maintain gut microbial balance, support digestive well-being, and promote normal immune responses when gut flora may be compromised.
What to know before use: L. reuteri is generally considered safe; however, people with weakened immune systems should consult a healthcare provider before using live probiotic bacteria.
Lactobacillus Reuteri Naturally Lives in the Human Gut
Lactobacillus reuteri is a type of probiotic bacteria that naturally inhabits the digestive tracts of humans and other mammals. It was originally discovered in the 1960s and is still found in the microbiome of healthy people today. This probiotic is often added to supplements because it can withstand stomach acid and reach the intestines, where it plays a role in maintaining a balanced gut environment.
