Final answer:
The high protein content in the American diet is linked to heart disease because it often comes with high levels of saturated fats and cholesterol, which can lead to atherosclerosis, increasing the risk of cardiovascular disease.
Step-by-step explanation:
The high protein content of the average American diet is closely linked to heart disease due to its association with high intakes of saturated fats and cholesterol. Foods rich in these substances, such as red meats, full-fat dairy products, and processed foods, can lead to the accumulation of plaque in the arteries, a condition known as atherosclerosis. This buildup narrows the arteries, reducing blood flow, and increasing the risk of heart attacks, strokes, and other forms of cardiovascular disease. Moreover, poor dietary choices combined with a sedentary lifestyle amplify the risks. A diet low in saturated fats and cholesterol, high in dietary fiber, and rich in plant-based foods is recommended to reduce the risk of heart disease.