What Does the Research Say About Probiotics and Health?

Probiotics are live microorganisms that can offer health benefits following consumption, by reversing dysbiosis: changes in the composition or function of gut microbes associated with the development of many chronic and degenerative diseases. The majority of probiotics contain nonvirulent, lactic acid-producing bacteria, including Lactobacillus, Streptococcus, Bifidobacterium, Propionibacterium, and Enterococcus, or yeasts such as Saccharomyces boulardii. They are available as dietary supplements or can be obtained from yogurt and other fermented foods. Probiotics have grown in popularity over the past few decades because of perceived benefits such as improved digestion, immune function, and nutrient absorption.