Preventing heart disease, part 2: Why cholesterol is a concern for heart health.
Cholesterol; it's a waxy, fat-like substance produced by the body and present in animal-based foods that's essential for the production of healthy cells, certain hormones and Vitamin D.
The problem is, one out of six Americans has too much cholesterol in our blood. And when this happens, there is a greater chance of cholesterol and other materials (plaque) building up in our arteries, making it difficult for blood to flow and increasing our risks of heart attack and stroke.
While all blood vessels of cholesterol build-up (which can result in a narrowing and hardening of the arteries which doctors refer to as atherosclerosis), the vessel walls of the aorta and coronary arteries that serve the heart are most often affected. The arterial walls eventually become hard, cutting off oxygen and blood supply to the heart itself.
So, do you know your cholesterol level?
The National Cholesterol Education Program recommends that all of us over the age of 20 have our cholesterol tested every 5 years. Statistically, that means, 1 in 4 of us is probably overdue -- but worse, 1 in 5 of us has NEVER had our cholesterol levels checked. And when you look at American ethnic groups -- nearly 1/2 of Hispanic adults (48%) have never had a cholesterol test!
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Is high cholesterol a concern only for adults?
No. The buildup of plaque in arteries begins in childhood and progresses over a lifetime. For this reason, it is important that ALL youngsters learn to eat a heart healthy diet. In addition, children whose parents have high cholesterol or whose parents or grandparents were diagnosed with heart disease at age 55 or younger are especially at risk and should be tested.
How would I know if I have high cholesterol?
There are no outward signs that you may have high cholesterol -- even skinny people can can be effected. (In fact, skinny people are often less careful about what they eat, consuming excessive saturated fats, trans fats, and dietary cholesterol -- all of which can increase cholesterol levels.) The only way to know if you suffer from high cholesterol is to have a simple blood test administered by your doctor. You will be instructed to abstain from eating or drinking anything for 9-12 hours prior to the test.
What will a cholesterol test tell me?
A cholesterol test (fasting lipoprotein profile) considers total cholesterol as well as:
HDL: The "good" cholesterol, which keeps cholesterol from building up in our arteries and protect us from heart disease. A low HDL number can increase your risk of heart disease while a high number is considered to be protective.
LDL: The "bad" cholesterol which, in excess, can clog arteries and increase our risk of stroke and heart disease. A higher number can increase your risk of heart attack or stroke but other risk factors should also be considered. The same number may be interpreted as healthy for one person but not healthy for another.
Triglycerides, the most common type of fat in the body. A normal triglyceride level varies according to age and sex but generally, a higher triglyceride level combined with low "good" cholesterol or high "bad" cholesterol can lead to the buildup of plaque on artery walls, called atherosclerosis.
Where does cholesterol come from and why do we even need it?
75% of the cholesterol in our body is produced by our liver while 25% of our cholesterol comes from the foods we eat. Cholesterol is necessary for a number of body functions including formation of cell membranes, production of hormones, Vitamin D, bile acids and more.
Factors that can influence our cholesterol in a negative way include:
- family history of high cholesterol
- being overweight or obese
- physically inactivity
- drinking alcohol in excess of 1 drink per day for women or 2 drinks per day for men
- consuming excessive amounts of simple carbohydrates/sugars
- consuming foods high in saturated fats, trans fats (most commonly found in snack foods, fast foods, shortening and margarine products) and cholesterol.
- certain medications such as progesterone, high blood pressure drugs, birth control pills, anabolic steroids and testosterone, female hormones and some acne medications.
- underlying diseases such as diabetes or metabolic syndrome
- as we age, our cholesterol and triglyceride levels normally increase
Factor which can influence our cholesterol for the better include:
- watch our weight. More than 2/3 of American adults are overweight including the 1/3 who are considered to be obese. To see if you are at a healthy weight, visit the CDC's BMI Percentile Calculator for Child and Teen or Adult BMI Calculator
- don't smoke and avoid exposure to secondhand smoke
- increase your physical activity: adults need least 30 minutes/5 days per week of some sort of physical activity -- even if it is something as simple as taking the steps rather than the elevator or parking farther away in a parking lot when you go to work or shopping. Children need 60 minutes every day.
- minimize consumption of saturated fats, trans fats, dietary cholesterol, sodium and sugar (sodas, candy and sweet desserts)
- eat a heart-healthy diet consisting of:
6+ servings/day of whole grain products such as breads, cereals, pasta, cooked grains (fiber to helps control cholesterol)
5-6 oz/day of lean protein,
8 to 10 servings/day of a variety of fruits and vegetables
2-3 servings/day of low or fat-free dairy products.
Omega-3 rich fish (such as salmon, trout or herring) at least twice a week
include more beans, peas, nuts and seeds
use unsaturated vegetable oils (such as canola, olive or safflower)
- limit alcohol intake
- medication may be prescribed if lifestyle changes are not enough to lower your cholesterol
To learn more about lowering cholesterol for better heart health, visit: http://www.heart.org/HEARTORG/Conditions/Cholesterol/Cholesterol_UCM_001089_SubHomePage.jsp