Mushrooms are emerging as natural medicine factories that can be genetically engineered to produce medications taken by mouth. Beyond their traditional use as health foods, scientists are now using advanced genetic techniques to program mushrooms to manufacture therapeutic proteins and vaccines. These engineered mushrooms can naturally package and protect these medications as they pass through the stomach, releasing them safely in the intestines for absorption. This approach offers a sustainable, affordable, and cold-chain-independent alternative to conventional injected medications.