It leads to the plugging up of arteries and contributes to development of diabetes which also tends to gunk up arteries. Eating cholesterol does not lead to high cholesterol. Your liver makes the cholesterol and other fats that end up in your blood. Saturated fats are prominent in lard and red meats. Read the food labels.
Monosaturated oils are canola oil and olive oil.
Start eating more fish. Be sure it is from a reliable source. The good omega-3 fats in fish are also efficient storage media for many environmental contaminants. Medicines to reduce fat in the blood have been evolving. For these reasons it never really caught on.