What is Cholesterol?
Cholesterol is a fat-like substance found inside every cell in your
body and is a necessary substance that your body requires to function
properly. Cholesterol does such things as make hormones, Vitamin D, and
substances that help you to digest foods.
If you have ever tried to mix oil and water you know that they do not
mix. Cholesterol and blood are the same as oil and water. Therefore
cholesterol is carried through the blood by something called
lipoproteins. Lipoproteins are made up of fat (inside) and proteins
(outside). There are different types of lipoproteins that carry
cholesterol through your body.
LDL (Low-Density Lipoprotein) is also known as the "bad" cholesterol. This type of cholesterol in large quantities leads to a buildup of cholesterol in your arteries. Over time, this can lead to heart disease.
HDL (High-Density Lipoprotein), or "good" cholesterol, carries cholesterol from various parts of your body to your liver. The liver then removes the cholesterol from your body. High HDL (good) cholesterol reduces your risk of getting heart disease whereas high LDL (bad) cholesterol increases your risk of getting heart disease.
Where does cholesterol come from?
Did you know there are two sources of cholesterol: food and family?
It is important to understand that there are two sources of
cholesterol. In addition to the cholesterol that comes from foods you
eat, cholesterol is also produced naturally in your body based on your
family health history.
How does LDL (bad) cholesterol increase the risk of heart disease?
When there is an abundance of LDL (bad) cholesterol in your blood, it
begins to build-up in the walls of your arteries. This build-up, called
plaque, causes a narrowing of the artery walls. This is called
atherosclerosis (ath-er-o-skler-o-sis). When this happens the amount of
blood that can reach your heart goes down. The flow of blood to your
heart can completely stop if the plaque builds up too much. When enough
blood can't reach the heart, people can have chest pain. This chest
pain, called angina, is a common sign of coronary artery disease.
Having high LDL (bad) cholesterol in your blood also puts you at risk
of forming blood clots that can cut off blood supply to your heart. The
result of this is a heart attack.
How do I find out what my cholesterol levels are and what they mean?
To start, you should make sure that you get your cholesterol tested
about once every five years. You can get tested at your doctor's
office, or there are many places that offer free screenings for
cholesterol. Be sure that if you get tested at a free screening that
you share the numbers with your doctor. When you get tested you will
most likely get a "lipoprotein profile." This test will give you
several pieces of information about your cholesterol, including: total
cholesterol; LDL (bad) cholesterol; triglycerides (another form of fat
in your blood); HDL (good) cholesterol.
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Okay, so my cholesterol is considered high, what do I do now?
Work with your doctor to identify a treatment plan that is right for
you. Your doctor may suggest making some lifestyle changes such as
modifying your diet, reducing your weight, and increasing your level of
physical activity.
Diet - Saturated fats and cholesterol in the food you eat make your blood cholesterol level go up. Start checking the nutrition labels to find out how much fat and cholesterol something has before you begin eating. Read more in the nutrition section of this web site to find out how to lower your LDL (bad) cholesterol with the foods you eat every day.
Weight – Excessive weight increases your cholesterol, thereby increasing your risk of heart disease. By losing weight, you bring down your LDL (bad) cholesterol while you raise your HDL (good) cholesterol level. The fitness section of this web site will give you examples of simple steps you can take to get in shape and help manage your cholesterol levels.
Physical Activity - Firefighters are often sedentary because of a need to be on call at the firehouse regardless of the number of incidents needing response. Doing physical activity for 30 minutes a day can help lower your LDL (bad) and raise your HDL (good) cholesterol as well as help you lose weight. Not bad huh? Talk to your doctor about an exercise plan that is right for you. You should aim to get at least 30 minutes of physical activity on most, if not all, days.
Courtesy of the National Heart, Lung and Blood Institute For more information: www.nhlbi.org