Stonyfield's O'Soy is made with organic soy milk vs. dairy. While we don't add any milk to our O'Soy soy yogurt, the live active cultures in O'Soy are grown in milk. The overall milk content of O'Soy is extremely low. However, because it's in the form of milk protein, if you're highly allergic to dairy, we don't recommend O'Soy. We can still assure you that O'Soy is lactose-free, so folks who are lactose intolerant and not allergic to milk can safely enjoy O'Soy. Stonyfield's traditional yogurts, because of the culturing process, are lower in lactose, but are not lactose-free. Our Oikos Greek yogurt is lowest in lactose because more lactose is removed during the straining process. People with lactose intolerance have varying degrees of intolerance. Some can tolerate yogurt and some can't. Sometimes, because lactose intolerance is the result of a deficit of the lactase enzyme, a lactase supplement can help to tolerate foods that contain lactose.