Of late, the yogurt isle is a sort of showroom for ridiculous health claims. Yogurt producers allege that their products do everything from cure the common cold, to regulate our digestive tracts, to prevent cancer. How much of it is true? The bright minds at NPR have us covered on that front.
The science behind yogurt and probiotics is tricky. Most of the research that confirms these absurd health benefits is funded by the companies that produce them (bias might be an issue here). What the research can agree upon, however, is that regular consumption, i.e. 2-3 servings a day, is necessary for any of the possible beneficial health effects. Eating yogurt once in a while will probably have little impact on your health.