Visit cholesterol screening has a puzzling characteristic: it looks for an imbalance that, most of the time, goes completely unnoticed. No pain, no visible signs—nothing to alert you in your daily life. That is precisely why a simple blood test is so useful: it reveals what the body keeps hidden. But when should you get tested, at what age, and why are we hearing more and more about «non-HDL» cholesterol? This article in our series on interpreting blood test results answers these questions and helps you better understand your situation—without ever replacing the advice of your healthcare professional.
On this page
- Why Screen for a Problem That Has No Symptoms
- When to Consider Screening
- Non-HDL cholesterol, a marker on the rise
- Screening Markers at a Glance
- Assessing Your Overall Cardiovascular Risk
- Fasting or not for the blood draw
- How to Access Screening in Quebec
- After screening: read and follow
- Myths and Misconceptions
- Frequently asked questions
- Sources
Why Screen for a Problem That Has No Symptoms
An imbalance in cholesterol levels generally causes no symptom symptoms. You can live for years with an abnormal level without even knowing it, while deposits slowly build up on the walls of your arteries. It is this silent nature of the condition that makes screening so important.
What Screening Enables
- Identify an imbalance before complications arise.
- Place one's profile within a broader assessment of cardiovascular risk.
- Initiate a discussion about lifestyle habits or follow up, if necessary.
- Track changes in values over time, from one balance sheet to the next.
Screening does not mean diagnosing or treating. It is an initial step to gather information, which provides the healthcare professional with the necessary details to evaluate, together with you, the appropriate next steps. Screening provides insight; it does not, on its own, provide a definitive conclusion.
When to Consider Screening
The coupon moment The frequency of cholesterol screening depends on each person’s age and risk factors. There is no one-size-fits-all rule: a healthcare professional determines whether screening is appropriate and how often it should be done.
Situations that warrant discussion
- An age at which screening is recommended; consult your doctor to determine the appropriate time.
- A family history of early-onset cardiovascular disease or high cholesterol.
- The presence of diabetes, high blood pressure, or smoking.
- Abdominal obesity or a sedentary lifestyle.
- Follow-up to a previous evaluation that showed values requiring monitoring.
The presence of one or more of these factors does not mean you have a cholesterol problem—it simply suggests that you should discuss it with your doctor. Conversely, the absence of risk factors does not necessarily mean you can skip screening at certain ages. This is where a professional’s advice makes all the difference.
Key Takeaways
- Cholesterol imbalance usually causes no symptoms.
- Screening involves a simple blood test.
- The right time depends on age and risk factors.
- Non-HDL cholesterol is becoming increasingly important in clinical assessment.
- Screening provides insight into overall risk; it does not, on its own, establish a diagnosis.
- The appropriateness and frequency should be determined in consultation with a healthcare professional.
Non-HDL cholesterol, a marker on the rise
We're familiar with LDL, HDL, and triglycerides. In recent years, another marker has been gaining importance in screening: the non-HDL cholesterol. The name sounds technical, but the concept is simple.
What it represents
Non-HDL cholesterol is total cholesterol minus HDL. In other words, it is a single number that represents all the particles considered potentially harmful to the arteries—not just LDL.
- It adds up all the fractions associated with arterial deposits.
- It does not depend on a calculation based on triglyceride levels.
- It remains reliable even when the sample was not collected on an empty stomach.
These benefits explain why Canadian guidelines now give it a prominent place alongside LDL. In practical terms, this makes screening easier: a blood sample taken without fasting is often sufficient, which simplifies things for people getting tested. However, interpreting this marker—as with others—is the responsibility of a healthcare professional.
Screening Markers at a Glance
A cholesterol screening is based on a Lipid panel, which measures several factors. Here are the most common indicators and their roles. The targets vary depending on each person's risk level; refer to the values and comments in your own report.
| Marker | Abbreviation | Lead Role |
|---|---|---|
| Total cholesterol | CT | Total cholesterol from all lipoproteins |
| LDL cholesterol | LDL-C | «Bad» cholesterol; high levels of it contribute to arterial plaque buildup |
| HDL Cholesterol | HDL-C | «Good» cholesterol; helps remove excess cholesterol |
| Triglycerides | TG | A form of fat that serves as an energy reserve |
| Non-HDL cholesterol | Non-HDL | All harmful particles combined (total minus HDL) |
Some reports include a calculated ratio, such as total cholesterol to HDL, which helps provide context for the overall profile. These figures guide healthcare professionals but do not replace a comprehensive assessment of your health.
Would you like to get your cholesterol checked or discuss your results? Make an appointment To pick up your order at one of our service locations in Quebec, speak with a professional by online consultation, or explore our solutions for companies when it comes to health checkups.
Assessing Your Overall Cardiovascular Risk
A screening result should never be interpreted in isolation. It is part of a broader assessment of the cardiovascular risk, that is, the likelihood of developing heart or vascular disease. Cholesterol is only one component of this.
The main factors taken into account
- Age and gender.
- A family history of early-onset cardiovascular disease.
- Smoking.
- High blood pressure.
- Diabetes or high blood sugar.
- Abdominal obesity and a sedentary lifestyle.
That is why two people with identical cholesterol levels may receive different recommendations: healthcare professionals use tools to assess overall risk in order to evaluate each individual’s situation. The same number carries different weight for a young, otherwise healthy person than for someone with multiple risk factors. It’s the overall picture—and how it changes over time—that matters.
Fasting or not for the blood draw
The issue of fast is often taken before a screening test. For a long time, patients were routinely asked to fast for several hours beforehand. Recommendations have changed: in many cases, a blood sample taken without fasting provides sufficient information, particularly because of non-HDL cholesterol, which varies little depending on meals.
When Fasting Can Still Be Beneficial
- When triglyceride levels need to be measured accurately, since they rise after a high-fat meal.
- When a healthcare professional explicitly requests it to compare it with a previous result obtained on an empty stomach.
- When other combined tests, such as fasting blood glucose, require it.
The golden rule is simple: always follow the instructions on your prescription or provided by the laboratory. If you have any doubts about how to prepare the sample, it’s better to check before the draw than to make an assumption.
How to Access Screening in Quebec
A cholesterol screening usually involves a prescription and a blood test. There are several ways to get started with the process.
- A request for testing submitted by a physician or another authorized professional.
- A sample collected at a service location that offers this type of test.
- A remote consultation to discuss the appropriateness of screening and the results.
If you don’t have a family doctor, there are other ways to get an evaluation and a prescription in Quebec. The important thing is not to skip screening just because you don’t know where to start: a healthcare professional can guide you through the process that’s right for your situation.
After screening: read and follow
Receiving your results isn't the end of the process, but the beginning of a discussion. A screening report only makes sense when viewed in the context of your overall health.
- A result that falls outside the reference range is not necessarily cause for alarm.
- A «normal» result does not mean you can skip follow-up care based on your profile.
- Changes in values over time often speak louder than a single report.
- Decisions—including those regarding lifestyle choices—are made in consultation with a professional.
Healthy lifestyle habits, such as a balanced diet, physical activity, and not smoking, support heart health. However, they do not guarantee a specific outcome, as genetics also play a role. It’s never about imposing a one-size-fits-all approach based on a single number, but rather about working with a professional to develop a plan tailored to your situation.
Myths and Misconceptions
«If I don't have any symptoms, there's no need to check my cholesterol.»
False. An imbalance in cholesterol levels generally causes no symptoms. That is precisely why screening through a blood test is useful for people at risk.
«You must always fast before a screening.»
Nuanced. This is no longer always necessary. In many cases, a blood sample taken without fasting is sufficient, particularly thanks to the non-HDL test. Fasting may still be necessary depending on the tests; follow your doctor’s instructions.
«If I'm thin, I don't need to get screened.»
False. Weight is just one factor among many. Genetics, age, and family history also play a role. A thin person can still have high cholesterol.
«One good screening settles the matter once and for all.»
False. Lipid profiles change over time, depending on lifestyle and age. A good result is encouraging, but periodic follow-up, as determined by a healthcare professional, remains important.
«Non-HDL is just another meaningless number.»
False. Non-HDL combines all harmful particles into a single, reliable value—even without fasting. This is precisely why it is playing an increasingly important role in screening.
Frequently asked questions
At what age should you get a cholesterol screening?
The appropriate time depends on each person’s age and risk factors. There is no one-size-fits-all rule: your healthcare provider will determine whether screening is appropriate and how often it should be done.
What is non-HDL cholesterol?
It is total cholesterol minus HDL. It combines all the particles associated with arterial plaque into a single number and remains reliable even without fasting, which explains its growing importance.
Do I need to fast before the screening?
Not always. In many cases, a blood sample taken without fasting provides sufficient information. Fasting may still be required, depending on the tests ordered. Follow the instructions on your prescription.
Does high cholesterol cause symptoms?
An imbalance in cholesterol levels generally does not cause any noticeable symptoms. That is precisely why screening with a simple blood test is useful for detecting it.
What should I do if my screening results show a «high» value?
Don't jump to conclusions on your own. Write down the result and discuss it with a healthcare professional, who will interpret it in the context of your overall cardiovascular risk before recommending a course of action.
Where can I get a cholesterol test in Quebec?
The sample is collected by prescription at a service location that offers this type of test. If you do not have a family doctor, there are other ways to get an evaluation and request a test.
Sources
- Heart + Stroke (Heart and Stroke Foundation)
- Canadian Cardiovascular Society
- National Institute for Excellence in Health and Social Services (INESSS)
- Diabetes Quebec
- Government of Quebec — Health
- Ministry of Health and Social Services (MSSS)
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