Smoking can typically lead to a decrease in good cholesterol (HDL) levels and an increase in bad cholesterol (LDL) levels. Although smoking does not directly produce cholesterol, it can disrupt cholesterol balance through its negative effects on blood vessels and changes in metabolism. Smoking is, by itself, a significant risk factor for vascular diseases. Considering that cholesterol is also a key risk factor in the development of atherosclerosis, the combination of smoking and high cholesterol exponentially increases the risk of cardiovascular diseases. Therefore, quitting smoking is of great importance for the protection of cardiovascular health.