If you are overweight, losing weight is important for lowering blood cholesterol. Butter is high in saturated fat, which raises blood cholesterol more than anything else you eat. My last cholesterol level was within my goal. High cholesterol and heart disease are not cured but are only controlled by diet and drug therapy. Stopping your treatment quickly returns your cholesterol to the level that existed before therapy was started.
Smoking has several harmful effects on cholesterol.
In addition, smoking has harmful effects on the heart and blood vessels. In these ways, smoking substantially raises the risk for coronary heart disease if you are healthy and multiplies that risk many more times if you have other risk factors such as high blood cholesterol. All in all, smoking is the leading preventable cause of death. The more you smoke, the lower your HDL cholesterol is likely to be. Lose weight if you're overweight.