Probiotic products have been marketed for a number of years, primarily in the yogurt category or as live microbial dietary supplements whose biological activity needed to be preserved. This tends to limit their consumption to supplements taken after meals or in fresh dairy foods. One technology now makes it possible to "have your probiotic and eat it, too!"
Research increasingly supports the medicinal benefits of food ingredients.
Even "empty calorie" food and beverages provide needed calories, if little else, to the human body. And, at the other extreme, more than a few plants have historical use not only as a food but for their medicinal benefits as well.