The ApoB Guide
LDL weighs the cholesterol. ApoB counts the particles carrying it, one ApoB on each, and heart attacks follow the count. Your lab prints one range for everyone, but your goal depends on your risk. Here's what your number means and what lowers it, by how much.
Updated November 15, 2026. 14 guide pages, 29 questions, 8 myths, from 45 published sources.
90The middle untreated American adult, and already the top of the goal at borderline risk.
23%lower odds of heart disease for genes that cut ApoB 10 points, in 654,783 people.
Chickenraised ApoB about as much as beef in a 2019 feeding trial.
15%An ApoB change under 15% can be noise. Past 23%, it's real.
Is my ApoB high?
Showing an example. Type your own number.
LDL or ApoA1 from the same report
You're 22 over your goal. Here's what the trials say lowers ApoB, and by how much.
112mg/dL, 1.12 g/L
- Under 60 very high risk
- Under 70 high risk
- Under 90 borderline or intermediate risk
- 120 raises risk
- 140 severe
mg/dL over g/L. Rungs from the National Lipid Association (2024), matched to the 2026 US guideline's LDL goals. Ticks from the 2026 guideline.
Clears 0 of 3 rungs. Compared with under 90, the goal at borderline or intermediate risk. Ask your doctor for your PREVENT score to find your rung.
Higher than 79 of 100 untreated US adults. Line up 100 of them and you'd be bead 80. The hundred beads
At 112, your blood carries about 1 in 4 more of these than at 90.
You're 22 points from under 90, the goal at borderline or intermediate risk. The biggest single food change in trials takes off about 7. A gap this size is a conversation to have with your doctor.
Next step. Start with the saturated fat cut and the protein swap, then retest at the same lab in 6 to 12 weeks. The twelve week plan
What your result means
- Under your goal: nothing to change. Test again with your next cholesterol panel.
- Over by up to about 20 points: the two food changes trials sized for ApoB, halving saturated fat and swapping meat for beans and soy, may close it. Retest at the same lab in 6 to 12 weeks.
- Over by more than 20: food alone rarely gets there. Take your numbers to your doctor and do the food changes too.
- 120 to 139: on the 2026 guideline's list of things that raise risk, whatever your goal.
- 140 or more: severe high cholesterol in the guideline. See a doctor first.
What brought you here?
-
My ApoB came back highWhat high means at your risk, and the 120 and 140 lines -
I want to get testedWhat to ask for, no fasting, and the home kit -
I want to lower it without medicineThe plan the trials ran, every change sized -
My LDL is normal but my ApoB is highMore particles, each carrying less -
Is my number normal?The lab’s range against the goal for your risk -
I heard the guidelines changedThe March 2026 lines and the Northwestern study -
My doctor brought up a statinThe case for and against, and what to ask -
Can I fix it with food alone?Your gap to your goal decides most of it -
My ApoB shot up on ketoWhy it happens and what the guideline says -
My LDL is at goal on a statin, but my ApoB isn’tWhy it lags, and the question for your prescriber -
It runs in my familyFH, Lp(a) and testing your relatives -
It went up around menopauseThe jump in the year around your last period
The questions people ask
Your number
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.
ApoB and LDL
- 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.
Testing
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.
Lowering it
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.
Special cases
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.
Same LDL, different count
LDL tells you how much cholesterol is on the road. ApoB counts the trucks. At the same LDL of 130, ApoB in 95 of 100 people ran from 86 to 109, in 293,876 adults in UK Biobank. Those with a high ApoB for that LDL had about 7 heart or artery events per 100 over 10 years, against about 4 for those with a low one.
Do my ApoB and LDL agree?Myth or fact?
Not the way you think If your LDL is normal, your ApoB is too
No ApoB is just another way to measure cholesterol
No Chicken is better for your ApoB than red meat
Sort of Fiber will bring a high ApoB down
No You have to fast for an ApoB test
Not the way you think A high ApoB on keto is fine if your triglycerides are low
No An ApoB that's normal for your age is a healthy ApoB
No A statin lowers ApoB as much as it lowers LDL
Quick calculators
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.
Lower it, then test it
The plan, as the trials ran it
- Halve the saturated fat in butter, cheese and fatty meat. About 6 to 7 points in four weeks.
- Beans, lentils, nuts and soy in place of meat, chicken included. About 3 to 4 more.
- Retest at the same lab in 6 to 12 weeks.
Ask for it by name
- It isn't in the standard panel. Ask your doctor to add it, or use a home kit.
- No fasting needed. ApoB didn't change after a meal in 33,391 adults.
- Same lab next time, 4 to 12 weeks after a change.
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.
