Everything in this guide
Updated November 15, 2026.
Lowering it and testing
Where can I get an ApoB test?
It isn't on the standard cholesterol panel, so ask your doctor to add it or use a home kit. No fasting needed. Use the same lab next time.
How do I lower ApoB naturally?
Halve the saturated fat in butter, cheese and fatty meat, and get your protein from beans, lentils, nuts and soy. Retest at the same lab 6 to 12 weeks later.
The guide
Your arteries count particles
Plaque builds from how many particles carry cholesterol into your artery walls, and for how many years. ApoB is that count. The map of everything here.
What ApoB counts
One ApoB protein wraps each particle that can get into an artery wall, so the test counts particles. LDL weighs the cholesterol inside them.
Why heart attacks follow the count
When ApoB, LDL and triglycerides go head to head, ApoB is the one that stays tied to heart attacks. Genes that lowered it 10 points cut the odds about 23%.
When ApoB and LDL disagree
They usually agree. They split most with high triglycerides, diabetes, extra weight or a statin, and then ApoB is the one to trust. The old LDL formula adds to it.
What is a good ApoB level for my risk?
Under 90 mg/dL at borderline or intermediate risk, under 70 at high risk, under 60 after a heart attack or stroke. At 120 or more the guideline says it raises risk.
What lowers ApoB, sized
Halving saturated fat took off about 6 to 7 mg/dL, plant protein in place of meat 3 to 4, psyllium 5 and oats 3. Medicine takes off about a third.
Getting tested, and telling a real change from noise
No fasting needed. Retest at the same lab 6 to 12 weeks after a change, and trust a change of more than about 15%, or 23% to be sure.
Can I lower ApoB without medication?
Often, if you're within about 10 to 20 points of your goal. Past that, at 140 or more, after a heart attack or with diabetes from 40, medicine is the talk to have.
Should I take a statin for a high ApoB?
It depends on your risk more than your number. The case for, the case against, who the 2026 guideline offers it to, and the questions to bring to your doctor.
ApoB on a statin
Statins lower ApoB less than LDL, about 33% against 42% on average, so LDL can reach goal first. The 2026 guideline says checking ApoB then is reasonable.
Why ApoB jumps around menopause
ApoB, LDL and total cholesterol jump in the year either side of the last period, a rise age alone doesn't explain. The same food changes still work.
What the 2026 guideline says about ApoB
The March 2026 US guideline moved ApoB's risk line from 130 to 120, named 140 as severe and backed testing it on treatment. What changed, and the April study after.
Questions
What is ApoB?
The protein on every particle that can carry cholesterol into an artery wall, one each, so the test counts them. LDL weighs the cholesterol, ApoB counts the carriers.
What does a high ApoB mean?
You carry more of the particles that build plaque than your goal allows. At 120 or more the 2026 guideline says it raises risk, and at 140 it's severe.
What is the normal range for ApoB?
The range on your report is a population range, and half of untreated US adults are at 90 or more. Your goal depends on your risk: under 90, 70 or 60.
What should my ApoB be?
Under 90 at borderline or intermediate risk, under 70 at high risk, under 60 after a heart attack or stroke (NLA, matched to the 2026 LDL goals).
Is an ApoB of 90 good?
It's the middle of untreated US adults and right on the goal line for borderline risk, where the goal is under 90. At high risk it's 20 over.
Is an ApoB of 120 high?
Yes. The 2026 guideline lists 120 or more as something that raises risk, and it's higher than about 86 of 100 untreated US adults.
Does ApoB go up with age?
In young adults it rises about half a point a year, but the guideline says that rise isn't optimal, and the goals don't move with age. Around menopause it jumps.
Should I aim for an ApoB under 60?
Under 60 is the NLA's number for very high risk, and fewer than 1 in 10 untreated adults are there. For everyone else no trial has tested it as a target.
Why is my ApoB high if my LDL is normal?
You have more particles, each carrying less cholesterol. It's most common with high triglycerides, diabetes, extra weight or a statin, and then ApoB is the one to trust.
What if my LDL is high but my ApoB is normal?
Your particles are fewer and each carries more. In statin users that pattern wasn't tied to more heart attacks. If LDL is 190 or more, see a doctor anyway.
Is non-HDL as good as ApoB?
Close. It's free from your usual panel and tracks ApoB well, and the guideline prefers either over LDL when triglycerides are high. ApoB still splits from it in some.
ApoB or LDL particle number: which test is better?
ApoB. It's standardized and runs on the same machines as a standard panel, and the guideline says particle tests rarely change anything beyond ApoB or Lp(a).
What is a good ApoB to ApoA1 ratio?
No US guideline sets one. In 52 countries the top fifth had 3.25 times the heart attack odds of the bottom fifth. Lower your ApoB first.
Do you need to fast for an ApoB test?
No. ApoB didn't change after a meal in 33,391 adults, and the 2026 guideline says the test is unaffected by fasting. Use the same lab next time.
Is ApoB part of a standard cholesterol test?
No. A standard panel has total, LDL, HDL and triglycerides. Ask for ApoB to be added, or use a home kit.
How often should I test ApoB?
With each cholesterol panel, and 4 to 12 weeks after a change in diet or medicine. Sooner than 4 weeks won't tell you much.
My ApoB went down 8 points. Is that real?
Maybe not yet. Two tests can differ by about 15% with nothing changed, so at 100 a drop has to pass about 15 points to be probably real and 23 to be clear.
How do I convert ApoB from g/L to mg/dL?
Multiply by 100. An ApoB of 0.9 g/L is 90 mg/dL, and 1.2 g/L is 120. The US guideline and US reports use mg/dL, and every tool here takes either.
Who should get an ApoB test?
The 2026 guideline says it helps most on treatment once LDL is at goal, and with triglycerides over 200, diabetes or LDL under 70. It may help anyone checking risk.
How fast can ApoB come down?
Within four weeks in feeding trials, once the food changed. Medicine moves it further, about a third on average. Retest 6 to 12 weeks after your change holds.
Does fiber lower ApoB?
A little. Soluble fiber took off about 4.5 points in 181 trials, psyllium about 5, oats about 3. Smaller than one retest's noise, so judge it over time.
Does saturated fat raise ApoB?
Yes. Halving it, from about 14% to 7% of calories, lowered ApoB about 6 to 7 points in a four-week trial, whatever the protein.
Does losing weight lower ApoB?
It lowers triglycerides, which ride in particles with ApoB on them, but we found no pooled trial number for ApoB. During fast loss, retest once your weight holds.
Does exercise lower ApoB?
Not by much that anyone has measured. It lowers triglycerides and raises HDL a little. Food changes and medicine have the measured effects on ApoB.
My LDL is at goal on a statin but my ApoB is high. What now?
That's common, since statins cut LDL more than ApoB. The guideline says checking ApoB here is reasonable to decide on more treatment. Take both to your prescriber.
Why is my ApoB so high on keto?
Swapping carbs for lots of saturated fat can push ApoB way up in some people, and the guideline lists ketosis as a cause. A lower ApoB helps however you get there.
Why did my ApoB go up after menopause?
ApoB jumps in the year either side of the last period (SWAN, 1,054 women). The same food changes still work, so retest a few months on.
Does ApoB include Lp(a)?
Yes. Every Lp(a) particle carries one ApoB, so your ApoB already counts them. Lp(a) is still its own test, and the 2026 guideline says to do it once.
Is high ApoB genetic?
Partly. Genes set how fast your liver clears the particles, and about 1 in 250 to 300 people inherit FH. A young family history raises your risk, so test your family too.
Myths
If your LDL is normal, your ApoB is too
Usually they agree. With high triglycerides, diabetes, extra weight or a statin they split, and statin users with high ApoB and low LDL had 1.5 times the heart attacks.
ApoB is just another way to measure cholesterol
ApoB counts particles, one protein on each. LDL weighs the cholesterol inside them. At the same LDL of 130, ApoB ran from 86 to 109 in UK Biobank.
Chicken is better for your ApoB than red meat
In a 2019 feeding trial, red and white meat raised ApoB about the same. Beans, nuts and soy in their place took off about 3 to 4 points.
Fiber will bring a high ApoB down
In 181 trials soluble fiber took off about 4.5 points. That's real, but two tests can differ by about 15 on a 100 with nothing changed.
You have to fast for an ApoB test
ApoB didn't change after a normal meal in 33,391 adults, and the 2026 guideline says the test is unaffected by fasting.
A high ApoB on keto is fine if your triglycerides are low
Genes that lowered ApoB cut heart disease the same per point whether triglycerides or LDL fell. The guideline lists ketosis as a cause of high LDL.
An ApoB that's normal for your age is a healthy ApoB
ApoB creeps up about half a point a year in young adults, and the guideline says that rise isn't optimal. The middle untreated adult is at 90, the top of a goal.
A statin lowers ApoB as much as it lowers LDL
Across 11 trials, LDL-lowering medicine cut LDL 42% and ApoB 33% on average, so LDL can reach goal while ApoB doesn't.
Tools
Is my ApoB high?
Your number against the goal for your risk, on the 60, 70 and 90 ladder, with your percentile and one next step.
Do my ApoB and LDL agree?
Both numbers from one report, placed in one of four corners, and what your corner means.
What would lower my ApoB?
Tap the changes you would make. Each one at its own trial's size, beside the normal test-to-test noise.
Did my ApoB really change?
Two results and their dates: whether the change is bigger than the difference between two tests.
How does my ApoB compare?
A hundred beads, one for each percentile of untreated US adults. Yours lights up.
What is my ApoB to ApoA1 ratio?
Both numbers in, your ratio out, and which half to work on first.
Why is my ApoB high?
Eight taps with pictures: what's most likely behind your ApoB, your top change and your retest date.
Track it in Gyroscope
Test your ApoB at home with the Gyroscope blood panel, and Gyroscope One reads every result against what you ate and how you trained.
Look up a number
ApoB, mg/dL
Green underline: under 90, the goal at borderline or intermediate risk. Rose: 120 to 139, which raises risk. Red: 140 or more.
