How do You Know if Kefir has Gone Bad?

Born and raised in Eastern Europe. I traveled and lived in many European countries. I learned about their culture and traditions. Now living in the USA, a great melting pot of cultures I love enjoying cultural experiences from all around the world. I am finding one in common among many different people is their strive for healthy long-living. We are made of what we consume. I strongly believe it is true. So the better food we eat, the healthier we are and can more enjoy our lives. And that became my mission. I spread the word about healthy eating habits, provide people with nutritious super-foods, and encourage everyone to produce their own.