What is a good probiotoc to buy?

Buying priobitics: 1.Multiple strains are more likely to provide balance than a product w a single strain. 2.You need to have enough of the probiotic to make a difference. It is better to have a product that contains billions versus millions of viable bacteria per gram. 3. Cultures need to be alive to start with. With the exception of Greek or Bulgarian Yogurt and specialized probiotic yogurts – the average