The doctor says your cholesterol is a little high, and you nod as if that settles something. On the drive home, you realize you have no idea which number was high, how high it was, or what you are supposed to do about it.
You are not alone, since according to Statistics Canada's health measures, more than one in four Canadian adults aged 18 to 79 has high cholesterol, and the share climbs to six in ten among people aged 60 to 79. Yet most people have never had anyone walk them through their own cholesterol numbers, which is a shame, because the lab report makes sense once someone translates it. This guide explains what each line means, why you can feel perfectly well while it climbs, and what genuinely brings it down.
Key takeaways
Statistics Canada's health measures show that more than one in four Canadian adults aged 18 to 79 has high cholesterol, rising to six in ten among people aged 60 to 79.
LDL is the number most treatment targets, because too much of it for too long builds up inside artery walls.
Raised cholesterol causes no symptoms, so a blood test is the only way to know where you stand.
Canadian guidelines recommend screening for adults 40 and older, and earlier for anyone with risk factors such as diabetes or a strong family history.
Most people no longer need to fast before the test, and changes to food and activity can help bring LDL down.
Why is there cholesterol in your body at all?
Cholesterol has a bad reputation for something your own body manufactures on purpose. It is a waxy substance made mostly in your liver, and you could not live without it, because it is a building block for the walls of your cells, for several hormones, and for vitamin D.
So the cholesterol in your body is supposed to be there, and the real question is how much of each type is circulating and for how long. When too much of the harmful kind travels through your bloodstream for years, it collects in the walls of your arteries and narrows them, which is how cholesterol earns its connection to heart attacks and strokes.
How do you read a lipid panel?
A standard cholesterol blood test in Canada, usually called a lipid panel, reports a handful of values in millimoles per litre, written as mmol/L. Once you know what each one measures, your cholesterol numbers start to read like a short story about your arteries instead of a chemistry exam.
LDL is the one your doctor watches most closely. LDL particles carry cholesterol out into the body, and when there are too many of them, cholesterol gets left behind in artery walls. That is why LDL is nicknamed the bad cholesterol, and why most treatments aim at lowering it. HDL works more like a cleanup crew that carries extra cholesterol back to the liver, which clears it, so a higher HDL is generally better.
Triglycerides are a different kind of blood fat that stores spare energy from food, and high triglycerides often show up alongside extra fat around the waist and high blood sugar. Total cholesterol is roughly everything added together, which makes it a handy headline that can still mislead on its own. Many newer reports also show non-HDL cholesterol, which is simply the total minus HDL and captures every particle that can harm your arteries in one number.
Is there a normal cholesterol level for everyone?
There is no single normal cholesterol level that fits every adult, which frustrates people who want a simple pass or fail. Statistics Canada has used reference points such as LDL under 3.5 mmol/L and HDL above 1.0 for men and 1.3 for women, though your doctor reads those against your whole health picture.
An LDL that is perfectly acceptable for a healthy 35-year-old can be too high for someone who lives with diabetes or has already had a heart attack. That is why the Canadian Cardiovascular Society guidelines pair cholesterol results with a full risk assessment, and why your doctor keeps glancing between the lab report and your chart.
Why can rising cholesterol cause no symptoms?
Raised cholesterol produces no symptoms at all, with no ache, no fatigue, and no warning light while the damage builds. Arteries can narrow for decades before anything feels wrong, and for some people the first sign is a heart attack or stroke, which is exactly why feeling fine tells you nothing here.
That silence explains why so many people go undiagnosed. In the most recent Statistics Canada lab measures to ask the question, collected between 2009 and 2011, only a quarter of people aged 12 and over with unhealthy total cholesterol had ever been told they had high cholesterol. Heart & Stroke adds that nine in ten Canadians have at least one key risk factor for heart disease and stroke. Healthy habits and good management could prevent almost 80 per cent of premature cases, and prevention starts with knowing your own results.
Do eggs and cholesterol really go together?
The idea that eggs and cholesterol rise and fall together is the most stubborn myth in this whole topic. For most people, the cholesterol in eggs doesn't seem to raise blood cholesterol the way foods high in saturated and trans fats do, according to Mayo Clinic.
Saturated fat is found mostly in red meat and full-fat dairy products such as butter and cheese. In practice, the egg itself matters less than the bacon, the sausage, and the buttered toast that usually keep it company on the plate.
Can family history raise your LDL even if you eat well?
Slim, active people can have high LDL, especially when genes are involved, which is why family history deserves a place in the conversation with your doctor. One inherited condition, familial hypercholesterolemia, affects roughly one in 250 people and drives LDL very high from birth regardless of diet. Our guide to why your cholesterol can be high even if you eat healthy explains how genetics and lifestyle share the load.
If a parent or sibling had high cholesterol at a young age, or heart disease at 55 or younger in a father or brother, or 65 or younger in a mother or sister, tell your doctor. That history can be a reason to test earlier, and the 2021 Canadian guidelines also recommend measuring a related marker called lipoprotein(a) once in your lifetime as part of your first screening.
How can you lower LDL with food and movement?
Food is usually the first lever, and two changes do much of the work when you want to lower LDL. Soluble fibre, found in foods such as oatmeal, kidney beans, Brussels sprouts, apples, and pears, helps block some cholesterol from being absorbed into your bloodstream. Swapping saturated fat for unsaturated fat, meanwhile, cuts back on the fat most likely to push LDL up.
In practice, that means cooking with olive or canola oil instead of butter and choosing fish or legumes over fatty meats several nights a week. A one-pan salmon dinner or a cold Mediterranean chickpea salad are easy places to start. Regular physical activity helps raise HDL, and quitting smoking matters too, since it can also help raise your protective HDL.
Medication is the other lever. Statins and other cholesterol-lowering medicines have been tested in very large trials, and for people at higher risk, they lower the chance of heart attack and stroke. If your doctor suggests one, that reflects your risk and your genes far more than your willpower, so it is worth an open conversation that includes any worries you have about side effects.
When should you get a cholesterol test in Canada?
Canadian guidelines recommend a cholesterol test for men and women from age 40, or earlier for anyone with risk factors such as diabetes, high blood pressure, smoking, kidney problems, obesity, or a family history of early heart disease. For most people, the test no longer requires fasting, so the old ritual of skipping breakfast is usually unnecessary.
Ask for a requisition. A family doctor or nurse practitioner can order a lipid panel as part of a routine checkup.
Skip the fast unless told otherwise. Most adults can eat normally beforehand, so follow any instructions printed on your requisition.
Request the actual values. Write down your LDL, HDL, triglycerides, non-HDL, and total instead of settling for a summary like a little high.
Ask what your results mean for you. Find out how your numbers compare with the levels where your doctor would recommend a change in treatment.
Book the next check. Agree on when to retest, since watching LDL fall after a stretch of new habits is genuinely motivating.
Frequently asked questions
What is a good LDL number for an adult?
Statistics Canada has used an LDL under 3.5 mmol/L as a healthy reference point for adults. Your doctor may want a lower number if you have diabetes, kidney problems, or a history of heart attack or stroke. The right level depends on your overall risk, so ask how your cholesterol numbers compare with the threshold that would change your care.
Do you need to fast before a cholesterol test?
Most adults no longer need to fast before a cholesterol test, and Canadian guidelines recommend nonfasting testing for screening. Your doctor may still ask you to fast if earlier results showed very high triglycerides. Always follow the instructions on your requisition, since your doctor or the lab may ask for fasting for a specific reason.
Can thin, active people have high LDL?
Thin, active people can have high LDL, especially when the cause is inherited. One genetic condition affects roughly one in 250 people and raises LDL from birth, regardless of diet or weight. A family history of early heart attack is a strong reason to get tested, even when you feel healthy and exercise regularly.
How fast can diet changes lower LDL?
How quickly LDL falls depends on your genes, your starting point, and how consistently you keep the changes. Adding soluble fibre and eating less saturated fat can both help bring it down. Ask your doctor when to repeat your lipid panel, so you can see whether the new habits are working for you.
What is lipoprotein(a) and should you test it?
Lipoprotein(a) is a type of cholesterol-carrying particle whose level is set mostly by your genes and raises heart risk when high. The 2021 Canadian guidelines recommend measuring it once in your lifetime as part of your first cholesterol screening. Ask your doctor whether your lab measured it, since a standard panel may leave it out.
Are statins safe to take long term?
Researchers have studied statins in very large numbers of people over many years, and for those at higher risk, they lower the chance of heart attack and stroke. Like any medicine, they can cause side effects, such as muscle aches, in some people. Talk through your concerns with your doctor or pharmacist before starting or stopping one.
Your next step
If you are over 40 and have never seen your cholesterol results, or it has been years since anyone checked, a routine blood test is a simple place to start. The Medimap Health Hub has more on heart-healthy eating. You can find a family doctor near you for a requisition, or book a registered dietitian who can turn eating better into a plan that fits how you actually eat.
Disclaimer: This article is for general information only and is not medical advice. It does not replace a conversation with a doctor or other qualified health professional who knows your history. If you think you are having a medical emergency, call 911 or go to the nearest emergency department.
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