Selenium, a vital trace element, is crucial for various bodily functions, especially for its role as an antioxidant and in thyroid hormone regulation. Its deficiency can severely impact heart health, potentially leading to Keshan disease, a serious heart condition. Selenium, a vital trace element, is crucial for various bodily functions, especially for its role as an antioxidant and in thyroid hormone regulation. Its deficiency can severely impact heart health, potentially leading to Keshan disease, a serious heart condition. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle