Every food additive or leavening agent has a shelf life when added to any food ingredients. Whenever you check the food label, ensure to check the name of the raising agent. Also, verify the date of manufacturing as well as expiry. It is essential to check the label every time you make a purchase.
Although it has a longer shelf life of its own, adding it to food products might decrease it. Especially with bread and other baked products, shelf life is not usually too long. But, packaged or processed food might stay for a longer duration.