Learn the signs, causes and risks of high cholesterol, how cholesterol testing works, and evidence-based ways to protect your heart health.
By Day2Day Healthmax Health Desk
High cholesterol often causes no obvious symptoms, yet it can quietly increase the risk of heart attack and stroke. Here is what the latest evidence says about cholesterol, testing, lifestyle changes and when treatment may be needed.
🩺 Today's Health Focus
High cholesterol is back in the spotlight—and many people may not know they have it
Cholesterol rarely announces itself.
You can feel completely well while having cholesterol levels that increase your long-term risk of cardiovascular disease. That makes testing particularly important.
The issue is receiving renewed attention this month after the World Health Organization published updated information on dyslipidaemia, the medical term for abnormal levels of fats in the blood, on 15 September 2026. WHO describes raised LDL cholesterol as a major modifiable risk factor for cardiovascular disease.
The timing is also notable in the UK, where NHS England announced plans for high-street pharmacies to provide quick cholesterol checks as part of efforts to identify cardiovascular risk earlier.
For readers in the USA, UK, Canada, Australia, Germany, Ireland and elsewhere, the underlying message is relevant: knowing your cardiovascular risk can give you an opportunity to act before a serious event occurs.
💬 Health Check
What exactly is cholesterol?
Cholesterol is a waxy, fat-like substance that your body needs.
It plays roles in making hormones, building cell membranes and producing substances involved in digestion.
Your liver makes cholesterol, and you also obtain some through food.
The problem is not cholesterol itself. The concern is having unhealthy levels of certain blood lipids, particularly low-density lipoprotein (LDL) cholesterol, which can contribute to the buildup of fatty deposits inside arteries.
This process is known as atherosclerosis.
Over many years, narrowing or blockage of arteries can contribute to conditions including coronary heart disease and stroke.
WHO's latest fact sheet estimates that around 39% of adults worldwide have raised total cholesterol, with the highest prevalence occurring in high-income countries in Europe and the Americas.
Why can high cholesterol be difficult to detect?
High cholesterol usually does not produce obvious symptoms.
That means headaches, tiredness, dizziness or feeling generally unwell should not automatically be blamed on cholesterol.
The most reliable way to find out whether your cholesterol is elevated is to have it measured through a blood test.
For some people, inherited conditions can cause very high cholesterol from an early age.
One example is familial hypercholesterolaemia (FH). WHO estimates that FH affects approximately 1 in 250 to 1 in 300 people worldwide, although many people remain undiagnosed.
What does an LDL cholesterol result mean?
You may hear healthcare professionals describe LDL as "bad" cholesterol and HDL as "good" cholesterol.
These labels are useful shorthand, but the full picture is more complicated.
LDL carries cholesterol through the bloodstream and can contribute to plaque formation in artery walls when levels are too high.
HDL is involved in transporting cholesterol away from tissues, but cardiovascular risk cannot be determined from HDL alone.
A standard lipid assessment may include:
Total cholesterol
LDL cholesterol
HDL cholesterol
Triglycerides
Healthcare professionals may also consider blood pressure, smoking status, diabetes, age, family history and other factors when assessing overall cardiovascular risk.
One cholesterol number does not tell the whole story.
Who should be particularly aware of their cholesterol?
Anyone can develop unhealthy cholesterol levels, but certain factors can increase risk.
These include:
Family history of high cholesterol or early cardiovascular disease
Increasing age
Certain inherited conditions
Diabetes
Overweight or obesity
Physical inactivity
Smoking
Diets high in saturated fats
Some medical conditions
Some medications
Family history deserves particular attention.
If a close relative experienced a heart attack or stroke at a relatively young age, tell your healthcare professional. It may influence whether you need earlier or more frequent assessment.
Can lifestyle changes lower cholesterol?
Yes.
Lifestyle changes can form an important part of cardiovascular-risk reduction.
The CDC identifies tobacco use, poor nutrition, physical inactivity and excessive alcohol use among major modifiable contributors to chronic disease. It recommends healthy eating, physical activity, avoiding tobacco and appropriate preventive care as important strategies for reducing chronic-disease risk.
1. Choose more fibre-rich foods
Build meals around vegetables, fruit, whole grains, beans, lentils and other fibre-rich foods.
Oats and barley, for example, contain soluble fibre.
A varied diet can also help replace foods high in saturated fat with healthier choices.
2. Pay attention to saturated fat
Saturated fats are found in foods including fatty meats, butter, some full-fat dairy products and certain processed foods.
Replacing some saturated fats with unsaturated fats can support healthier blood lipid levels.
Good sources of unsaturated fats include nuts, seeds, olive oil, avocados and many oily fish.
3. Move regularly
Physical activity supports cardiovascular health and has benefits beyond cholesterol.
Walking, cycling, swimming, dancing and other activities can all contribute to an active lifestyle.
If you have been inactive for a long time, start gradually and increase activity according to your abilities and medical circumstances.
4. Do not smoke
Smoking damages blood vessels and increases cardiovascular risk.
Stopping smoking is beneficial even if you have smoked for many years.
If you smoke, ask your healthcare professional about evidence-based quit support.
5. Keep alcohol within recommended limits
Alcohol can contribute to a range of health problems, and drinking heavily can increase cardiovascular and other health risks.
If you drink, follow the lower-risk drinking guidance used in your country.
You do not need to start drinking alcohol for heart-health reasons.
💡 Health Tip of the Week
Know your numbers—but do not obsess over one number
If you have not had your cholesterol checked recently, ask a healthcare professional whether testing is appropriate for you.
When you receive your results, ask:
"What does this result mean for my overall cardiovascular risk?"
That question is often more useful than simply asking whether your cholesterol is "high" or "normal."
Your clinician can interpret your result alongside your age, blood pressure, medical history, family history, diabetes status, smoking status and other relevant factors.
If treatment is recommended, ask what the treatment is intended to achieve and when your levels should be checked again.
🧠 Did You Know?
High cholesterol can contribute to cardiovascular disease without producing warning symptoms.
WHO reports that elevated LDL cholesterol was responsible for an estimated 3.6 million deaths globally in 2023, principally through its contribution to ischaemic heart disease and ischaemic stroke.
This is one reason preventive testing matters: identifying an elevated risk factor can create an opportunity for intervention before cardiovascular disease becomes clinically obvious.
When should you speak with a healthcare professional?
Consider discussing cholesterol testing with a healthcare professional if:
You have never had your cholesterol checked.
You have a family history of high cholesterol.
A close relative developed cardiovascular disease at a young age.
You have diabetes.
You have high blood pressure.
You smoke.
You have previously been told your cholesterol is elevated.
You have been diagnosed with a condition associated with increased cardiovascular risk.
If you already take cholesterol-lowering medication, do not stop it simply because you feel well or because a single result has improved.
Discuss changes with the clinician who prescribed it.
Why a cholesterol test can be useful even when you feel healthy
Preventive healthcare is often about finding risks before they become emergencies.
High cholesterol is a good example.
A person can have elevated LDL cholesterol for years without knowing it. During that time, cholesterol-related plaque can gradually accumulate in the arteries.
This does not mean that everyone with high cholesterol will develop a heart attack or stroke.
It means cholesterol is one part of a larger cardiovascular-risk picture—and it is a risk factor that can often be addressed.
WHO describes raised LDL cholesterol as one of the principal modifiable cardiovascular risk factors.
What happens during a cholesterol test?
A cholesterol test usually involves a blood sample.
Depending on the healthcare system and the type of test, the sample may be taken from a vein or through another validated testing method.
Your healthcare professional will tell you whether any preparation, such as fasting, is required for the specific test being used.
The results can then be considered alongside your broader health profile.
Testing practices and recommended screening intervals vary between countries and individual circumstances, so there is no universal schedule that applies to everyone.
Can diet alone fix high cholesterol?
Sometimes lifestyle changes can make a meaningful difference, but not everyone with elevated cholesterol can manage the condition through diet alone.
Genetics can play a substantial role.
People with familial hypercholesterolaemia, for example, can have very high LDL cholesterol because of inherited changes affecting how the body handles cholesterol.
Some people may therefore require medication in addition to lifestyle measures.
This is why "just eat better" is not an appropriate universal answer to high cholesterol.
A balanced diet is valuable for overall health, but treatment should be individualized.
What about cholesterol-lowering medication?
Depending on a person's cardiovascular risk and cholesterol levels, a healthcare professional may recommend medication.
Statins are among the medicines commonly used to lower LDL cholesterol and reduce cardiovascular risk.
The decision to use medication depends on individual circumstances rather than a single cholesterol measurement.
If medication is prescribed, take it according to the instructions and discuss side effects or concerns with your healthcare professional.
Never stop prescribed medication without discussing it with the prescriber.
Heart health is about more than cholesterol
Cholesterol deserves attention, but cardiovascular prevention involves several interconnected factors.
WHO's latest heart-attack guidance emphasizes prevention through measures including avoiding tobacco, eating a diet rich in fruit, vegetables and whole grains while limiting salt and saturated fat, staying physically active, limiting alcohol, and treating conditions such as high blood pressure, diabetes and abnormal blood lipids when present.
That means a heart-health plan should not become a single-minded effort to lower one laboratory number.
Think of it as a collection of habits:
Move more.
Don't smoke.
Eat a varied diet.
Know your blood pressure.
Check your cholesterol when appropriate.
Manage diabetes if you have it.
Attend recommended preventive appointments.
Small improvements can add up.
What symptoms could indicate a heart emergency?
High cholesterol itself generally does not cause symptoms.
However, the cardiovascular conditions associated with cholesterol-related artery disease can produce serious warning signs.
A heart attack can cause:
Chest pain, pressure or discomfort
Pain or discomfort spreading to the arm, shoulder, back, neck or jaw
Shortness of breath
Sweating
Nausea or vomiting
Sudden weakness or unusual fatigue
Symptoms can vary, and some people—particularly women, older adults and people with diabetes—may experience less typical symptoms.
If you think you or someone else may be having a heart attack, seek emergency medical help immediately.
Do not wait for symptoms to disappear.
🌿 Healthy Living Spotlight
Make cardiovascular prevention part of your normal routine
Heart health does not have to mean following a complicated programme.
A practical approach is to build prevention into ordinary life.
Walk when you can.
Choose vegetables, fruit, whole grains, beans and other minimally processed foods regularly.
Use unsaturated fats in place of some saturated fats.
Avoid tobacco.
Make time for regular physical activity.
Know your blood pressure and ask whether you should have your cholesterol checked.
And perhaps most importantly, use preventive appointments as an opportunity to discuss your whole health picture, rather than focusing on a single number.
CDC guidance similarly emphasizes healthy eating, physical activity, tobacco cessation and preventive care as important approaches to reducing chronic-disease risk.
A new focus on earlier cholesterol checks
The growing emphasis on cholesterol testing reflects a broader shift toward prevention.
NHS England announced in August that high-street pharmacies would launch seven-minute cholesterol checks, intended to identify cardiovascular risk and support earlier intervention.
The approach is consistent with the broader principle that cardiovascular disease can sometimes be prevented or delayed by identifying modifiable risk factors earlier.
Other countries use different screening systems, so readers should check the recommendations and services available through their own healthcare system.
The Bottom Line
High cholesterol can be easy to overlook because it usually does not make you feel ill.
That is precisely why knowing your cholesterol—and understanding it in the context of your overall cardiovascular risk—can be valuable.
The latest WHO evidence reinforces the importance of addressing raised LDL cholesterol and other cardiovascular risk factors.
You do not need to make dramatic changes overnight.
Start with the basics:
Know your risk.
Get appropriate checks.
Eat a balanced diet.
Stay active.
Avoid tobacco.
Take prescribed treatment as directed.
Ask questions about your results.
Preventive healthcare works best when it becomes part of everyday life.
Trusted evidence used for this article
This article draws on current information from:
World Health Organization
U.S. Centers for Disease Control and Prevention
NHS England
WHO/IARC cancer and cardiovascular research resources
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Health disclaimer: This article is for educational purposes only and is not a substitute for professional medical advice, diagnosis or treatment. If you have symptoms, abnormal test results or concerns about your cardiovascular health, speak with a qualified healthcare professional.
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