We already know that there are trillions of microorganisms inside or digestive tract. Together they are known as Gut microbiota. What we eat, i.e., the type of food we eat can change the composition of these microorganisms. It can either increase the number of beneficial microorganisms inside our digestive tract or reduce their number, allowing the growth of bad/harmful microorganisms. Prebiotics are complex carbohydrates. They resist digestion and or absorption within our digestive tract. They act as a source of food for the good/beneficial microorganisms (Good bacteria). These beneficial microbes break down prebiotics to use them as a source of food and energy for their growth. It increases the number of beneficial bacteria inside our digestive tract, which has multiple benefits on our overall health.