Healthy adults should regularly check their cholesterol levels with a blood test called a lipid profile. This test includes measurements of total cholesterol, LDL (low-density lipoprotein), HDL (high-density lipoprotein), and triglycerides. Understanding these numbers can help you assess your risk for heart disease and stroke. LDL is often referred to as 'bad' cholesterol because high levels can lead to plaque buildup in arteries, increasing the risk of heart disease. HDL is known as 'good' cholesterol because it helps remove LDL from the bloodstream. Triglycerides are another type of fat in the blood, and high levels can also increase the risk of heart disease. Your doctor will consider these numbers along with other factors like age, blood pressure, and smoking status to determine your overall risk and recommend lifestyle changes or medications if necessary.