Holy weight loss, Batman! Spend enough time scrolling through keto-diet or weight-loss Reddit threads and you’re bound to come across the “whoosh” — an effect that many dieters explain as a sudden but significant drop in pounds. Doctors and nutrition experts have debunked the concept before, though the whoosh effect is not altogether flim-flam. Still, dieting with the goal of rapid weight loss is rarely healthy, and protocols advocating for it should be taken with more than a grain of salt.