## Scientists reveal what seven days of fasting does to the human body Going without food for several days does far more than force the body to burn stored fat. Research published in 2024 found that prolonged fasting produces widespread and coordinated biological changes across multiple organs, with some of the most notable effects appearing only after about three days without calories. The findings, published in Nature Metabolism, offer an unusually detailed look at how the human body responds during an extended fast. Researchers found evidence of biological effects that went beyond weight…