Key Takeaways
- A cholesterol (lipid) panel reports total cholesterol, LDL, HDL, triglycerides — and often non-HDL, which is simply total minus HDL
- In Canada the numbers come in mmol/L: general reference points include total cholesterol under 5.2, triglycerides under 1.7, and HDL above 1.0 for men and 1.3 for women
- Your personal target depends on your overall heart risk — the same LDL number can be fine for one person and too high for another
Your Cholesterol Results Are In. Now What?
You open your patient portal.
Total cholesterol: 5.6. LDL: 3.4. HDL: 1.2. Triglycerides: 1.9.
One number has a little flag beside it.
Should you worry? Change your diet? Call your doctor? And what on earth is "non-HDL"?
Welcome to the cholesterol panel — a blood test packed with numbers that can tell you something important about your heart, provided you know how to read them.
Also called a lipid panel or lipid profile, this test matters because high cholesterol has no symptoms. You cannot feel it. As the Heart and Stroke Foundation of Canada explains, the only way to know is to measure it.
So let's decode those numbers, in Canadian units, without turning this into a medical textbook.
Five Cholesterol Numbers, Five Different Jobs
First, a surprise: cholesterol isn't your body's enemy.
It's a waxy, fat-like substance your body needs to build cells and produce hormones and vitamin D. Your liver makes most of it.
The trouble starts with transportation.
Cholesterol travels through your blood inside particles called lipoproteins. And depending on which particles are carrying it, the story changes.
1. Total Cholesterol: The Headline Number
Total cholesterol measures all the cholesterol in your blood, combined.
Think of it as the headline without the full story. Useful? Yes. Enough to understand your risk? Not on its own.
2. LDL: The Number You Usually Want Lower
LDL (low-density lipoprotein) is commonly called "bad" cholesterol.
Why the bad reputation?
LDL is the main source of plaque that builds up inside artery walls, gradually narrowing them.
Lower is better.
3. HDL: The Number You Usually Want Higher
HDL (high-density lipoprotein) gets the nickname "good" cholesterol.
It helps transport excess cholesterol back to your liver, where it can be removed.
Unlike LDL, higher HDL is generally better. It's the cholesterol number where a higher score is good news.
4. Triglycerides: Not Cholesterol at All
Here's the twist: triglycerides aren't cholesterol.
They're a type of fat in your blood, closely connected to what you eat and drink.
High triglycerides raise heart disease and stroke risk, particularly when they appear alongside high LDL and low HDL.
5. Non-HDL: The Number Hiding in Plain Sight
Non-HDL cholesterol = Total cholesterol − HDL cholesterol.
That's it.
But this simple calculation captures all the plaque-building particles together.
It's why Canadian laboratories increasingly include non-HDL on reports, and why clinicians increasingly pay attention to it.
One more thing: if your LDL result says "calculated," don't panic.
Laboratories often estimate LDL using total cholesterol, HDL and triglycerides rather than measuring it directly. That's normal practice, not a reason to distrust the result.
What Cholesterol Numbers Mean in Canada
Ever searched your cholesterol result online and discovered that American websites use completely different-looking numbers?
There's a reason.
Canada reports cholesterol in mmol/L, while American websites commonly use mg/dL.
For perspective, MedlinePlus considers total cholesterol below 200 mg/dL healthy — approximately 5.2 mmol/L.
Here are the general reference points commonly printed by Canadian laboratories:
- Total cholesterol: under 5.2 mmol/L
- LDL: under 3.5 mmol/L for lower-risk adults
- HDL: low below 1.0 mmol/L for men and 1.3 mmol/L for women
- Triglycerides: under 1.7 mmol/L when fasting
- Non-HDL: under 4.2 mmol/L for lower-risk adults
Two People. Same LDL. Different Advice.
Imagine two people receiving exactly the same LDL result.
One is young and has a low risk of cardiovascular disease.
The other has already experienced a heart attack.
Should they have the same cholesterol target?
Not necessarily.
These numbers are general reference points, not personal treatment targets.
MedlinePlus emphasizes that healthy cholesterol levels depend on age, family history, lifestyle and other risk factors.
In Canada, clinicians consider your overall cardiovascular risk when setting LDL goals.
Someone who has experienced a heart attack, has diabetes or has several risk factors will typically have a much lower target — often below 2.0 mmol/L or even 1.8 mmol/L.
Meanwhile, a younger adult at low risk might not need treatment at a level that would prompt action for someone else.
Same number. Different meaning.
That's not medical indecision. That's how personalized cardiovascular risk assessment works.
Do You Really Need to Fast Before a Cholesterol Test?
Remember being told not to eat anything before your morning blood test?
Traditionally, patients fasted for 9 to 12 hours before cholesterol testing.
The main reason? Triglycerides.
Their levels can rise after eating, potentially affecting the results.
But testing practices have changed.
Many routine cholesterol screening tests in Canada are now performed without fasting. If triglycerides are high, your clinician may request another test while fasting.
The important rule hasn't changed: follow the instructions on your own laboratory requisition.
Your results need to be interpreted according to how your blood sample was collected.
How Often Should You Check?
You don't necessarily need a cholesterol test every year.
MedlinePlus provides these general testing intervals:
- Adults aged 20 to 65: approximately every 5 years
- Men aged 45 to 65 and women aged 55 to 65: every 1 to 2 years
- Adults over 65: every year
The Heart and Stroke Foundation recommends discussing cholesterol testing with your healthcare provider starting at age 40, or earlier if you have risk factors.
Those include high blood pressure, diabetes, smoking, or a family history of heart disease, stroke or high cholesterol.
And there's one inherited condition worth knowing about.
Familial hypercholesterolemia causes very high LDL cholesterol from birth.
Early diagnosis and treatment can make a real difference. If close relatives experienced heart disease at an early age, bring that history to your clinician's attention.
What Actually Changes Your Cholesterol Numbers?
You've seen the numbers. You know what they mean.
Now comes the practical question: what can you do about them?
Food: It's Not Just About Eggs
Here's something many people misunderstand.
The Heart and Stroke Foundation explains that dietary cholesterol, found in foods such as eggs, meat and dairy, has less influence on blood cholesterol than saturated and trans fats.
So instead of obsessing over one food, look at the bigger picture.
Choose more whole, minimally processed foods. Fill half your plate with vegetables and fruit. Include whole grains and soluble fibre — oats and barley can genuinely help.
Unsaturated fats from fatty fish, nuts, olive oil and canola oil are useful choices.
And cut back on ultra-processed foods and sugary drinks.
Exercise: Give Your Heart 150 Minutes
The general goal is 150 minutes of moderate-to-vigorous physical activity per week.
Regular activity helps improve HDL cholesterol and supports overall heart health.
Weight and Smoking: Two More Pieces of the Puzzle
Carrying extra weight tends to increase LDL and triglycerides while lowering HDL.
Smoking also lowers HDL.
Quitting smoking is one of the fastest ways to improve that number.
Medication: Sometimes Lifestyle Isn't Enough
Healthy habits matter, but they aren't always sufficient.
When necessary, clinicians may prescribe cholesterol-lowering medication, including statins.
The Heart and Stroke Foundation emphasizes that medication doesn't replace healthy habits.
Both can be part of a treatment plan based on your overall cardiovascular risk — not simply one flagged number on a laboratory report.
This article is general information only and is not medical advice. Cholesterol results are always read alongside your full health picture — talk to your own doctor, nurse practitioner or pharmacist about what your numbers mean and what, if anything, to do about them.
The Twikup Take
Your cholesterol panel isn't a report card. It's more like a weather forecast for your arteries.
And the best time to act on a forecast is before the storm arrives.
Know your five numbers. Understand why lower LDL and higher HDL are generally desirable. And remember that your personal cholesterol targets depend on your overall health and cardiovascular risk.
The blood test takes five minutes. The information can guide your health decisions for years.
The number beside the warning flag matters — but the story behind that number matters even more.
Image: AI-generated illustration.