What is considered the most effective method of preventing coronary heart disease in adolescents?

The most effective method of preventing coronary heart disease in adolescents is avoiding smoking. Smoking is a significant risk factor for the development of coronary heart disease and can initiate or exacerbate atherosclerosis at an early age. By avoiding smoking, adolescents significantly reduce their risk of cardiovascular issues both in the short term and over their lifetimes. The harmful substances in tobacco smoke can damage blood vessels, leading to the accumulation of plaque, which narrows arteries and restricts blood flow.

While regular health screenings, frequent exercise, and healthy dieting habits are important for overall health and can contribute to cardiovascular health, they do not address the specific risk imposed by tobacco use. By making the choice to avoid smoking, adolescents take a proactive step toward long-term heart health, making it the most effective method among the options listed for preventing coronary heart disease.