Helps naturally regulate your digestive system. Weekly pack 7 + 1. Activia with Bifidus Regularis. Grade A 2% Milkfat. Dannon Activia is a delicious way to help naturally regulate your digestive system: Clinically proven to be effective in two weeks, when eaten daily. Contains a natural probiotic culture - Bifidus Regularis exclusive to Dannon. A smooth, blended, lowfat yogurt with fruit pieces, everyone can enjoy.