Why ApoB Matters
When your doctor orders a standard cholesterol panel, they see LDL-C: the amount of cholesterol inside the particles. ApoB measures the particles themselves.
It's the particles — specifically LDL particles and other apolipoprotein B-containing particles — that penetrate artery walls and contribute to plaque. The amount of cholesterol inside each particle is secondary to how many particles are moving through your bloodstream.
Some people have high particle counts with normal cholesterol levels. These are called "discordant" — their LDL looks fine, but their cardiovascular risk is elevated. ApoB catches this. LDL doesn't.
What a Normal ApoB Level Looks Like
- Optimal: Below 80 mg/dL
- Borderline elevated: 80–99 mg/dL
- Elevated: 100 mg/dL or above
- Very high risk target: Below 65 mg/dL
How to Lower ApoB
- Diet: Reducing saturated fat, increasing fibre, Mediterranean-style eating
- Exercise: Regular aerobic activity
- Statins: Highly effective at reducing ApoB
- PCSK9 inhibitors: For very high-risk patients
- Weight management
Is ApoB Tested in a Standard Physical?
Generally, no. ApoB is not routinely included in OHIP-covered preventive bloodwork.
The Bottom Line
ApoB is the most accurate single marker for cardiovascular risk available.
