Water fasting has been trending as the ultimate way to “reset” the body, but is it really as powerful, or safe, as it seems? From fat loss and muscle breakdown to changes in metabolism and nutrition, fasting impacts the body in complex ways. Before diving headfirst into days, or even weeks, of nothing but water, it’s worth knowing what science says actually happens inside your body.

Quick-fix diets like the watermelon fast often deliver rapid but fleeting results, leaving people wondering if the sacrifice was worth it. Are these short-term “successes” masking deeper risks to your health and metabolism? In this article, a registered dietitian unpacks the science behind monofood diets, explores why they seem to work at first, and reveals the smarter, safer strategies you can use to achieve real, lasting progress.

You’ve probably heard that “endomorphs should cut carbs” or that “ectomorphs need to eat more”—but what if the whole concept of body type dieting is built on outdated pseudoscience? Before you adjust your plate based on your frame, there’s something you need to know.