I can't speak for most people, but Activia does absolutely nothing for me. I've been eating it ever since it hit the store shelves, yet I have felt very little to no improvement. Activia has probiotics in it, so it helps to balance out the bacteria in your digestive tract...which by doing so, is supposed to keep things moving and help you stay more "regular". But like I said, it doesn't work for me. I could eat probiotic yogurt until I'm blue in the face, and I don't think it would help me. I have to take probiotic pills in order to get enough good bacteria...there just doesn't seem to be enough of it in the yogurts, to make a difference with me.