Final answer:
Risk factors for high blood cholesterol include physical inactivity, smoking, and genetics, whereas high dietary fiber is not a risk factor and can actually help to lower cholesterol levels.
Step-by-step explanation:
The risk factors for high blood cholesterol include physical inactivity, smoking, and genetics, such as conditions like familial hypercholesterolemia (FH). However, high dietary fiber is generally not considered a risk factor; in fact, it can help lower cholesterol levels. Smoking lowers HDL (good) cholesterol and raises LDL (bad) cholesterol, while physical inactivity can reduce HDL cholesterol levels. Genetics can also play a role in high cholesterol, making certain individuals more susceptible regardless of lifestyle choices. Other related factors contributing to high blood cholesterol and cardiovascular risk include poor nutrition, obesity, hypertension, diabetes, and an unhealthy diet rich in saturated and trans fats.