Probiotics are the friendly bacteria which are naturally found in certain food items and also in our gut. There are many probiotic drinks in the market too which appeal people to drink it every day. But are they really needed for our health? We find out more on it from Dr Neha Sanwalka. What are probiotics? Probiotics also known as 'good bacteria' or 'helpful bacteria' are living microorganisms that are beneficial to our health. The human digestive tract contains about 400-500 types of good bacteria that reduce growth of harmful bacteria and promote a healthy digestive system. Lactic acid bacteria