High cholesterol can significantly affect heart health by increasing the risk of atherosclerosis, where plaque builds up in the arteries, leading to restricted blood flow. This condition raises the chances of developing serious cardiovascular issues, including heart attacks and strokes. Maintaining healthy cholesterol levels is essential to support overall heart function. Lifestyle changes, such as a healthier diet, regular exercise, and avoiding tobacco, play a crucial role in managing cholesterol levels and promoting heart health.