I have never taken/eaten Activia for the 14 days. However, as a herblist, I recommend just taking a probiotics as a supplement, bifidophilus or acidophilus, and food enyzmes. Probiotics help fights candida in the lower and upper intestinal tract and promotes good bowel health. The American diet leaves us depleted of the good or friendly bacteria that we need to digest our food. When people are irregular, usually they need to replenish the friendly bacteria in the digestive and intestinal system. Fiber also helps by absorbing toxins and removing them from our system.
Activia may have more disadvantages than advantages, so READ the label before you take the challenge. I recommend a detoxification program or cleanse (with 3 suggestions above plus a few others) which is better and healthier for you. Email me if you desire more information.