Name a common dietary source of probiotics.

Yogurt is a common dietary source of probiotics because it is made through the fermentation of milk by specific beneficial bacteria, primarily strains of Lactobacillus and Bifidobacterium. These live microorganisms contribute to gut health by promoting a balanced intestinal microbiota, enhancing digestion, and potentially providing various health benefits. The fermentation process not only lends yogurt its characteristic tangy flavor but also increases its nutritional value by making certain nutrients more bioavailable.

While cheese does contain some beneficial bacteria, not all types have probiotics, as many are heat-treated or aged, which can kill off viable microorganisms. Fruits and nuts, although nutritious and part of a balanced diet, do not generally provide significant amounts of probiotics, as they are not fermented products. Therefore, yogurt stands out as a primary and accessible source of live probiotics in a typical diet.