Final answer:
A high-protein diet might not lower cholesterol because it often includes animal products high in saturated fats and cholesterol, which can raise 'bad' LDL cholesterol levels. A diet low in saturated fat, high in unsaturated fats, with lean proteins, and regular physical activity is more effective in managing cholesterol.
Step-by-step explanation:
An obese client asks why a high-protein diet will not help reduce her elevated cholesterol level. A practical nurse would explain that while protein itself isn't directly responsible for cholesterol levels, the type of protein sources consumed can be crucial. Many high-protein diets include large amounts of animal products such as meat and dairy, which are also high in saturated fats and cholesterol. Consuming too much saturated fat can raise the levels of 'bad' low-density lipoprotein (LDL) cholesterol in the blood, which contributes to plaque buildup in the arteries.
To help reduce cholesterol levels, it is recommended to adopt a diet that is not only low in saturated fat and cholesterol but also emphasizes unsaturated fats from plant sources and lean protein. Additionally, increasing physical activity can improve the LDL:HDL ratio and promote heart health. Avoiding processed foods high in sugar, salt, and fat is also beneficial, according to the USDA's MyPyramid. Hence, a comprehensive approach including dietary modifications and exercise is more effective for cholesterol management compared to just focusing on high-protein intake.