Understanding Your Cholesterol Numbers
What total cholesterol, LDL, HDL, and triglycerides really mean for your heart health
38%of American adults have high cholesterol
Last reviewed: April 2026
Cholesterol is a waxy substance your body needs to build cells and make hormones. Your liver makes all the cholesterol you need. The problem starts when too much of the wrong kind builds up in your blood, raising your risk for heart attack and stroke.
A simple blood test called a lipid panel measures your cholesterol levels. Understanding what those numbers mean is the first step toward protecting your heart. This guide breaks down each number, explains what is considered healthy, and outlines when lifestyle changes or medication may be needed.
In Arizona, heart disease remains a leading cause of death. The state's dry heat can affect how and when residents exercise, making it important to find strategies that work year-round.
The Four Numbers on Your Lipid Panel
A standard lipid panel measures four things: total cholesterol, LDL cholesterol, HDL cholesterol, and triglycerides. Each plays a different role in your cardiovascular health. Your provider looks at all four numbers together, not just one, to assess your risk.
LDL: The "Bad" Cholesterol
Low-density lipoprotein (LDL) carries cholesterol to your arteries. When LDL is too high, it can build up on artery walls and form plaques. Over time, these plaques narrow your arteries and can lead to heart attack or stroke.
Optimal LDL is below 100 mg/dL for most adults. If you have existing heart disease or diabetes, your provider may want it below 70 mg/dL. Above 160 mg/dL is considered high.
HDL: The "Good" Cholesterol
High-density lipoprotein (HDL) acts like a cleanup crew, carrying cholesterol away from your arteries and back to your liver for removal. Higher HDL is generally better.
An HDL level of 60 mg/dL or above is considered protective against heart disease. Below 40 mg/dL for men or 50 mg/dL for women is a risk factor. Regular exercise, not smoking, and eating healthy fats can help raise HDL.
Triglycerides
Triglycerides are a type of fat in your blood. Your body converts calories it does not use right away into triglycerides and stores them in fat cells. High triglyceride levels combined with high LDL or low HDL increase your risk of heart disease.
Normal triglycerides are below 150 mg/dL. Levels between 150 and 199 are borderline high, 200 to 499 are high, and 500 or above are very high. Cutting back on sugar, refined carbohydrates, and alcohol can make a significant difference.
Total Cholesterol
Total cholesterol is the sum of your LDL, HDL, and 20% of your triglyceride level. A desirable total cholesterol is below 200 mg/dL. Between 200 and 239 is borderline high, and 240 or above is high. However, total cholesterol alone does not tell the full story. A person with high total cholesterol might have excellent HDL, which changes the picture significantly.
Know Your Targets
These numbers give you a quick reference, but your provider will set personalized targets based on your full health picture, including age, blood pressure, smoking status, and family history.
Lifestyle Changes That Lower Cholesterol
Diet, exercise, and weight management are the first line of defense. Focus on eating more fruits, vegetables, whole grains, and lean proteins. Replace saturated fats (found in red meat and full-fat dairy) with healthier fats like olive oil, avocados, and nuts. Limit fried foods and processed snacks.
Exercise for at least 150 minutes per week at moderate intensity. In Arizona, summer heat makes outdoor exercise challenging. Consider early morning walks, indoor gym sessions, swimming, or mall walking during the hottest months. Even splitting your activity into 10-minute blocks throughout the day counts.
When Medication Is Needed
If lifestyle changes alone do not bring your numbers to target, your provider may recommend cholesterol-lowering medication. Statins are the most commonly prescribed and have decades of evidence supporting their effectiveness. Other options include ezetimibe, PCSK9 inhibitors, and bile acid sequestrants.
Your provider will discuss the risks and benefits based on your personal health profile. Medication works best alongside continued healthy habits, not as a replacement for them.
When to See a Cardiologist
Your primary care provider can manage cholesterol for most patients. However, you should ask for a referral to a cardiologist if your LDL remains above target despite medication, you have a family history of early heart disease (before age 55 in men or 65 in women), you have been diagnosed with familial hypercholesterolemia, or you have had a heart attack, stroke, or stent placement. Do not delay a referral if your provider recommends one.
Arizona-Specific Considerations
Arizona's extreme summer heat affects exercise routines, hydration, and even how some medications work. Dehydration can concentrate blood lipids and affect test results. Schedule your fasting blood work for the morning before the heat peaks. Stay hydrated throughout the day, especially if you are on diuretics or blood pressure medications alongside cholesterol treatment.
Many Arizona cities have extensive indoor walking paths, community recreation centers, and heated pools that support year-round physical activity.
Preparing for Your Cholesterol Test
- Fast for 9-12 hours before your blood draw (water is fine)
- Avoid alcohol for 24 hours before the test
- Take your regular medications unless your provider says otherwise
- Bring a list of all medications and supplements you take
- Write down questions you want to ask about your results
Frequently Asked Questions
How often should I get my cholesterol checked?
Adults age 20 and older should have a lipid panel every 4-6 years if their risk is low. If you have risk factors, are on cholesterol medication, or have a history of heart disease, your provider may check it annually or more often.
Can young people have high cholesterol?
Yes. High cholesterol can affect people of any age, including children. Familial hypercholesterolemia is a genetic condition that causes very high LDL from birth. The AAP recommends cholesterol screening for children between ages 9 and 11.
Do eggs raise cholesterol?
For most people, dietary cholesterol from eggs has a modest effect on blood cholesterol. The bigger culprits are saturated and trans fats. Current guidelines say most healthy adults can eat up to one egg per day as part of a balanced diet. Consult your provider if you have specific concerns.
Are statins safe?
Statins are among the most studied medications in history and are safe for most people. Side effects like muscle pain occur in a small percentage of patients. If you experience side effects, talk to your provider about adjusting the dose or trying a different statin.
Can I stop taking cholesterol medication if my numbers improve?
Do not stop medication without talking to your provider. Cholesterol levels often rise again once medication is discontinued. Your provider can help you decide whether it is safe to reduce or stop treatment based on your overall risk.