Cholesterol is a vital fat-like substance essential for building and maintaining cell membranes. Since it is insoluble in water, it combines with proteins in the liver to form lipoproteins, enabling its transport in the bloodstream. Cholesterol is generally divided into two main categories: "good" and "bad."

LDL Cholesterol (Low-Density Lipoprotein) – "Bad" Cholesterol
LDL cholesterol transports cholesterol from the liver to body tissues. High LDL levels increase the risk of atherosclerosis (hardening of the arteries) by causing cholesterol to accumulate in artery walls. This condition can narrow blood vessels, making blood flow difficult, and potentially setting the stage for blood clots that can lead to a heart attack or stroke.

HDL Cholesterol (High-Density Lipoprotein) – "Good" Cholesterol
HDL cholesterol collects excess cholesterol from tissues and transports it back to the liver to be removed from the body. This "reverse transport" process helps clear arteries and contributes to maintaining a healthy cardiovascular system. High HDL cholesterol levels offer protection against the risk of heart attack and stroke, while low levels can increase these risks.

General Assessment
For optimal cardiovascular health, it is crucial not only to control "bad" (LDL) cholesterol levels but also to ensure sufficient levels of "good" (HDL) cholesterol. Triglycerides, another important type of fat in your blood, are also transported in the bloodstream like cholesterol. Although the relationship between triglyceride levels and atherosclerosis is not as distinct as that of cholesterol, they are considered part of the overall lipid profile.