Kodak Gelatin Tags
Kodak has developed an edible RFID tag, which they claim has many important benefits. The tags themselves are coated with a thick layer of soft gelatin which takes a while to dissolve. After dissolving the tags are intentionally fragile and will dissolve when exposed to gastric acids in the stomach. These tags can also be used in artificial joints, to help notify doctors when a replacement may be needed, and also these tags can be used on pills so that nurses can monitor if the patient has taken their medication or not.