ApoB comes down with the same changes that lower LDL cholesterol: less saturated fat, more soluble fiber, losing excess weight, bringing high triglycerides down and, when your overall risk calls for it, lipid-lowering medication. Food changes usually move ApoB by a few mg/dL. Medicines usually move it much further.
This guide sets out roughly how much each lever does in pooled trials, so you can have a realistic conversation with your clinician. It describes evidence and does not recommend any treatment.
Key takeaways
- ApoB is a count of the particles that build plaque, and lowering it is what the risk reduction seems to follow.
- Swapping saturated fat for unsaturated oils and eating more soluble fiber each trim ApoB by small amounts.
- Lower triglycerides help only to the extent that the particle count falls with them.
- Cholesterol medicines lower ApoB far more than diet, and they differ in strength.
- Any medication change belongs in a conversation with the person who prescribes for you.
Why ApoB is the number to move
Every particle that can lodge in an artery wall and start plaque carries one ApoB protein, so the test is a particle count. Our ApoB test guide covers the basics, and high ApoB with normal LDL explains why the two numbers can disagree.
The case for targeting ApoB is strong. A genetic study of more than 650,000 people found that lowering triglycerides and lowering LDL cholesterol were linked to similar drops in coronary risk for the same change in ApoB.1
How much each lever moves ApoB
| Change | Typical effect in trials | What to keep in mind |
|---|---|---|
| Unsaturated oils in place of saturated fat | ApoB about 3% to 4% lower | Short feeding trial; the replacement food matters |
| Soluble fiber (oats, psyllium) | ApoB about 3 mg/dL lower with oats | Small but consistent |
| Weight loss | Triglycerides and LDL lower per kilogram lost | Effect on ApoB not reported in the pooled data |
| Cholesterol medicines | LDL from about 20% to half or more lower, by class | Prescription decisions depend on your risk |
Diet: saturated fat and soluble fiber
Saturated fat raises LDL, and what you eat in its place decides whether the swap helps. In a controlled feeding trial in adults with excess weight around the middle, six weeks on diets made with canola oil instead of an oil blend with a typical Western fat profile lowered ApoB by about 3% to 4% and LDL cholesterol by about 6%.2
Soluble fiber binds bile acids in the gut, so the liver pulls more cholesterol out of the blood. A pooled analysis of 58 trials found that a median of 3.5 grams a day of oat beta-glucan lowered ApoB by about 3 mg/dL.3 The fiber and cholesterol guide lists food sources.
Combining several cholesterol-lowering foods adds up to more than any one of them. Our guide to lowering LDL naturally gives the numbers for that combined approach.
Weight loss and triglycerides
Particles rich in triglycerides carry ApoB too, so very high triglycerides usually mean extra particles. Weight loss is one of the main ways triglycerides come down. In a pooled analysis of 73 trials, each kilogram (2.2 pounds) lost through lifestyle programs was linked to triglycerides about 4 mg/dL lower and LDL cholesterol about 1.3 mg/dL lower at one year.4 Alcohol, refined carbohydrates and blood sugar also drive triglycerides, as our guide to triglycerides and heart risk explains, and insulin resistance often sits behind the pattern.
Here the genetic study matters again. It took about 70 mg/dL less triglyceride to match the ApoB change, and the coronary benefit, of about 14 mg/dL less LDL cholesterol.1 A large triglyceride drop counts for only as much as the particle count moves with it, which is why a repeat ApoB test is the fairest check.
Medicines that lower ApoB
Several drug classes lower ApoB along with LDL cholesterol. This is a factual summary, not a recommendation.
- Statins slow cholesterol production in the liver and are the most studied class. The 2018 US cholesterol guideline set treatment goals of lowering LDL cholesterol by at least 30%, or by 50% or more in people at higher risk.5
- Ezetimibe reduces cholesterol absorption in the gut.
- PCSK9 inhibitors help the liver clear more particles. They are given by injection.
- Bempedoic acid slows cholesterol production at a different step than statins. A meta-analysis of seven trials found it lowered ApoB by about 14% and LDL cholesterol by about 20% compared with placebo.6
When non-statin medicines were compared as add-ons to the highest tolerated statin, a network meta-analysis of 48 trials ranked the PCSK9 antibodies as the strongest for LDL, non-HDL cholesterol and ApoB, with ezetimibe and bempedoic acid on their own giving smaller effects. See statin alternatives for their outcome trials.
Do not start, stop or change a medication without your prescriber. If you hope diet and weight loss will mean less medication, raise it with your prescriber.
Next step: measure ApoB before and after a change
A starting value and a repeat test are the only way to know what your changes did. ApoB is measured in both Cardio Res-Q assessments: the Comprehensive Assessment ($775) and the Enhanced Assessment ($999), which adds a CIMT ultrasound and a coronary calcium score. The clinic prescribes statins and non-statin medicines case by case, and you can keep sharing results with your own doctor.
For testing logistics, read ApoB and Lp(a) testing in Conshohocken, or go to the Cardio Res-Q program page.
Are You a Candidate for Cardio Res-Q?
Three quick questions about the risk factors we screen for. Your answers stay between you and the clinic.
Frequently asked questions
Can I lower ApoB without medication?
Often by some amount. Food swaps, soluble fiber and weight loss each lower it modestly, and together they can add up to a meaningful change. Whether that is enough depends on how high your ApoB is and on your overall risk, which is a question for your clinician.
How fast does ApoB change?
The diet trials in this guide ran from a few weeks to a few months and showed changes in that time, and medicines act faster still. Ask your clinician when a repeat test makes sense for you, so you are comparing a steady habit and not a single good week.
Does lowering triglycerides lower ApoB?
Partly. Triglyceride-rich particles carry ApoB, so fewer of them can mean a lower count. But genetic evidence suggests the benefit follows the ApoB change, not the size of the triglyceride drop, so ApoB is the number to recheck.
Related reading
This article is for general education and is not medical advice. Decisions about testing and medication should be made with your clinician. If you have chest pain or other symptoms of a heart attack, call 911.
