Many yogurt products contain healthy bacteria called probiotics that aid and assist in regulating the digestive system, reports WebMD. However, yogurt can also have an adverse effect on the digestive system of an individual as well.
The negative or positive effect yogurt has on the body depends on how that individual's body responds to the product. Many suffer from lactose intolerance and have a hard time digesting dairy products. An individual can find out if yogurt is the specific cause of his constipation by keeping a log of eating habits and seeking advice from an experienced health professional, notes WebMD.