A 2018 study that looked at the data from 6.7 million people over seven years found that those whose weight fluctuated most dramatically between physician appointments were 43 percent more likely to suffer a heart attack during the study period, 41 percent more likely to have a stroke, and a shocking 127 percent more likely to die.

Associations of Variability in Blood Pressure, Glucose and Cholesterol Concentrations, and Body Mass Index With Mortality and Cardiovascular Outcomes in the General Population