The molecules of which foods are made are too large to pass through the lining of the digestive system. Digestion results in the formation of smaller molecules that are able to pass through that lining and enter the person's bloodstream. (for example,) Sugar molecules formed by the digestion of starch enter the bloodstream.
Either way, not worth the risk - you can get very ill from consuming or drinking expired products, including ice tea. Now if it is a best before date, that tells us something else. It says it has not turned or gone bad, but that it may not taste very fresh after the date on the bottle. There is a huge difference between the comments expired and best before - so please use caution and consider these points. For dry ice tea mix, you usually see a best before date.
If it has gone bad, the pleasant aroma of the leaves will be gone. Tea gone bad only means that the natural oils in the leaves has evaporated over time, making the leaves far less flavorful. Before the flavor is completely gone you can just use extra bags or leaves to still make a fresh pot.ea, made from the leaves of the Camellia Sinensis plant, is enjoyed both hot and iced. Because it is rich in antioxidants and relatively low in cost, it is one of the most popular drinks in the world. Survival lists say to pack it and nations fight over it.