India, Nov. 11 -- Every year, as winter approaches, many countries turn their clocks back by an hour to mark the end of daylight saving time - a practice originally introduced to make better use of daylight and conserve energy. While this shift may seem small and even welcome for adding an extra hour of rest, experts say it can take a surprising toll on the body. Even a one-hour disruption can throw off the circadian rhythm, making it harder for many people to adjust physically and mentally.

Dr Jeremy London, a cardiothoracic surgeon with over 25 years of clinical experience, has shed light on the surprising effects that daylight saving time can have on the human body. In an Instagram video posted on November 10, the cardiac surgeon expl...