What Is Cholesterol?
Cholesterol is a waxy, fat-like substance found in your blood. It plays an essential role in the body—helping to produce hormones, vitamin D, and substances that aid digestion. Although necessary for good health, having too much cholesterol in the blood can increase the risk of serious health conditions.
Did you know?
Approximately 75% of cholesterol is made by the liver, while the remaining 25% comes from the food we eat, particularly animal-based products like meat, dairy, poultry, seafood, and eggs.
How Is Cholesterol Carried in the Body?
Cholesterol doesn’t travel alone. It combines with proteins to move through the bloodstream—this combination is known as a lipoprotein.
Types of Cholesterol: The Good and the Bad
There are two main types of cholesterol:
• High-Density Lipoprotein (HDL) – “Good” Cholesterol
HDL helps transport excess cholesterol from the arteries back to the liver, where it is
removed from the body. Higher levels of HDL are associated with a lower risk of heart
disease and stroke.
• Low-Density Lipoprotein (LDL) – “Bad” Cholesterol
LDL carries cholesterol to the arteries, where it can accumulate on artery walls, forming
plaques. Elevated levels of LDL increase the risk of artery blockages, heart attacks, and
strokes. Only about one-third to one-quarter of cholesterol in the blood is carried by HDL.
Why Is High Cholesterol Dangerous?
While cholesterol is essential, excess LDL cholesterol can build up in the arteries, narrowing them and restricting blood flow—a condition known as atherosclerosis.
Consequences of High Cholesterol:
• Narrowed Arteries
Plaque buildup reduces the space inside arteries, making it harder for blood to flow. This
forces the heart to pump harder, which over time can weaken its function.
• Blood Clots
Clots can form over hardened plaques, blocking arteries completely. These clots may also
travel and lodge elsewhere in the body, leading to life-threatening conditions such as:
Heart attacks
• Strokes
• Deep vein thrombosis (DVT)
• Pulmonary embolism
Common Causes of High Cholesterol
Several lifestyle factors and genetic conditions can contribute to elevated cholesterol levels:
• Unhealthy diet (high in saturated and trans fats)
• Physical inactivity
• Smoking or tobacco use
• Being overweight or obese
• Genetic predisposition (Familial Hypercholesterolemia)
Potential Health Risks of High Cholesterol
Persistently high cholesterol levels can contribute to a range of serious conditions:
• Coronary artery disease
• Angina (chest pain)
• Heart attack
• Stroke or Transient Ischemic Attack (TIA)
• Peripheral arterial disease (PAD)
• Heart failure
• Vascular dementia
How to Manage Your Cholesterol
Making the right changes can significantly reduce your risk:
• Adopt a heart-healthy diet
• Engage in regular physical activity
• Quit smoking and avoid tobacco products
• Maintain a healthy weight
• Follow your doctor’s advice regarding medications if prescribed
By taking proactive steps, you can improve your heart health and lower the chances of developing serious complications related to cholesterol.