Cholesterol Screening: LDL, ApoB, and What Your Lipid Panel Really Says
One in four Canadian adults has elevated cholesterol. A modern lipid panel is one of the most useful tests in preventive medicine — if you know what to read.
Why we measure cholesterol
Cholesterol itself is not the villain — it is essential for cell membranes, hormones, and vitamin D. The problem is how cholesterol is packaged and how much of it circulates in atherogenic particles that infiltrate arterial walls. Over decades, that infiltration builds the plaque that causes heart attacks and strokes.
The single strongest modifiable driver of premature cardiovascular disease is elevated atherogenic cholesterol. Detecting and treating it early is one of the most cost-effective interventions in modern medicine.
Reading a standard lipid panel
A standard panel reports four numbers:
Total cholesterol — a global figure, not itself decisive.
LDL cholesterol — the historical "bad" cholesterol. Target < 3.5 mmol/L in low-risk adults, < 2.0 mmol/L in high-risk adults, < 1.8 mmol/L after a cardiovascular event.
HDL cholesterol — historically "good" cholesterol; higher is generally better but very high HDL is not necessarily protective.
Triglycerides — target < 1.7 mmol/L; strongly influenced by diet, alcohol, insulin resistance.
Why ApoB may matter more than LDL
Every atherogenic particle (LDL, VLDL, IDL, Lp(a)) carries exactly one apolipoprotein B molecule. Measuring ApoB gives a direct particle count — the number of arrows aimed at your arteries, not just the total cargo they carry.
When LDL and ApoB disagree, ApoB is generally the better risk predictor — particularly in patients with insulin resistance, high triglycerides, or metabolic syndrome, whose LDL can look reassuring while their particle count is high. This is why every Complete Assessment at CurAge Santé includes ApoB.
Lp(a): the genetic marker to measure once
Lipoprotein(a) is a genetically determined atherogenic particle. About one in five people has an elevated Lp(a), which independently raises cardiovascular risk. Because it is genetically set, one lifetime measurement is enough — and it should be done at least once in every adult, ideally before age 40.
A high Lp(a) does not mean bad outcomes are inevitable — it means the other levers (LDL, ApoB, blood pressure, smoking) matter even more, and treatment thresholds get tightened accordingly.
Do you need to fast for a lipid panel?
For most patients, no. Guidelines now support non-fasting lipid panels for routine screening — LDL and cholesterol values change minimally after a meal. Fasting is still preferred when triglycerides are high or when the panel is part of a broader metabolic workup.
For everything you need to know about fasting, see our fasting before blood work guide.
Get your cholesterol screened
A lipid panel is included in every Essential Checkup; ApoB and Lp(a) are added at the Complete Health Assessment level. Book via the contact form.
Frequently asked questions
At what age should I start lipid screening?+
Age 40 for men and women with average risk; age 30 or earlier with a family history of early cardiovascular disease, diabetes, or elevated Lp(a).
Do I need a statin if my LDL is high?+
It depends on your total cardiovascular risk, not just LDL. A risk score combined with ApoB, blood pressure, and other factors guides the decision.
Can diet alone lower cholesterol enough?+
For mildly elevated cholesterol, often yes — a Mediterranean or DASH pattern can lower LDL by 10–15%. For higher levels, diet is essential but rarely sufficient.
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