Yogurt with Live Cultures: Benefits & Brands - The Dairy Dish You should look for the seal on the yogurt label that reads “Live & Active Cultures” or similar verbiage to ensure the product contains live cultures. While all yogurt is initially made with live cultures, the cultures can be killed off if the manufacturer heat treats the yogurt to prolong shelf life. The U.S. Food and Drug Administration requires yogurt to be labeled “heat treated after ...