Heart diseases are a major cause of deaths globally. Doctor Jeremy London reveals three key risk factors. Obesity is a significant contributor, often linked to poor diet and high blood pressure. Sedentary lifestyle increases heart disease risk, even with regular exercise. Smoking remains the worst habit for the heart, affecting arteries and overall health.Heart diseases are a major cause of deaths globally. Doctor Jeremy London reveals three key risk factors. Obesity is a significant contributor, often linked to poor diet and high blood pressure. Sedentary lifestyle increases heart disease risk, even with regular exercise. Smoking remains the worst habit for the heart, affecting arteries and overall health.