Probiotics are broadly defined as live microorganisms that provide health benefits to their host (eg, people) when taken in adequate amount/quantity. These organisms are often found in your body, food, or other supplements and are classified as “good” bacteria. A normal human digestive tract contains about 500–1000 strains of probiotic bacteria that work to defend vital bodily systems. When most people hear the word “bacteria,” they think of infection or disease. However, good bacteria such as probiotics provide protection against other harmful bacteria and promote a healthy digestive system. 

The benefits of probiotics
Probiotics play an essential role in promoting overall health. These organisms benefit a number of areas within the body, including:

•    Counteracting harmful bacteria that cause disease
•    Fighting against intestinal infections
•    Manufacturing vitamins
•    Promoting specific immune responses
•    Playing a role in the prevention of diseases, including peptic ulcers, colorectal cancer, and inflammatory bowel disease
•    Breaking down uremic toxins in the digestive tract

WHO Defines -  “Probiotics are live microorganisms, which, when administered in adequate amounts, confer a health benefit on the host”