High-Sensitivity CRP: Testing for Heart Disease Risk Beyond Cholesterol

Quick answer

hs-CRP stands for high-sensitivity C-reactive protein, a blood test for hidden, long-term inflammation. A high level raises your heart disease risk, separate from cholesterol. Doctors see under 1 mg/L as optimal. Most people can lower a high result in about 12 weeks through diet, sleep, and exercise changes.

What is hs-CRP?

Your liver makes a substance called C-reactive protein, or CRP. It makes this whenever there is inflammation anywhere in your body. Inflammation is your body's response to injury, infection, or irritation, like the redness and swelling around a cut.

A regular CRP test only catches large amounts, like during a bad infection. The high-sensitivity version, hs-CRP, catches much smaller amounts. This small, ongoing inflammation is the kind that quietly damages your arteries over years.

Both tests measure the same substance. The hs-CRP test is just far more precise at low values.

Reference ranges

A result over 10 mg/L usually means you have a recent infection, injury, or did intense exercise. It is not usually a sign of long-term disease. Retest in 4 to 6 weeks once you feel back to normal.

Why does hs-CRP predict heart disease?

Ongoing inflammation is one of the main drivers behind clogged arteries, a condition called atherosclerosis. A clogged artery is not just built from cholesterol. It is also an inflamed one.

Inflammation does several things to your arteries.

• It damages the inner lining of your blood vessels.
• It helps bad cholesterol stick to artery walls.
• It can make existing plaque break open, which is what causes most heart attacks.
• It disrupts how fat is stored around your organs.

A high hs-CRP reflects all of this happening inside your body. Large, long-term studies show that hs-CRP predicts heart attacks and strokes, even in people with normal cholesterol and blood pressure. One well-known study, called the JUPITER trial, tested this idea. It found that a statin, a cholesterol-lowering drug, still helped people with normal cholesterol but high hs-CRP.

What raises hs-CRP

Here are the most common causes doctors see today.

• Extra belly fat. Fat around your organs releases substances that cause inflammation.
• Poor sleep. This includes not enough sleep and untreated sleep apnea, a condition where breathing stops and starts during sleep.
• Ongoing stress. Long-term stress keeps your stress hormone, cortisol, out of balance.
• A poor diet. This means lots of refined carbs, processed food, and little fiber or omega-3 fats.
• Not moving enough. Exercise directly lowers inflammation.
• Gum disease. This is a surprisingly common, hidden source of inflammation.
• Heavy drinking. This keeps your liver inflamed.
• Smoking. This raises every marker of inflammation.
• Air pollution. Living or working in a polluted area adds to your inflammation load.
• Ongoing infections. This includes gum disease and urinary infections left untreated.

Some causes sit outside your control, like aging, hormone shifts, and some autoimmune conditions.

How doctors test hs-CRP

This test needs one blood sample. You do not need to fast first.

If you were sick, injured, vaccinated, or did intense exercise in the past week, wait before testing. Your result could come back falsely high. Test again once you feel back to your normal self.

How to lower a high hs-CRP

1. Lose extra belly fat

This is the single most powerful step. Losing just 5 to 10% of your body weight, especially around your belly, can measurably lower hs-CRP.

2. Sleep better

• Aim for 7 to 8 hours of good sleep.
• Treat sleep apnea if you have it.
• Keep a steady sleep schedule.

3. Move more

Both cardio exercise and strength training fight inflammation. Aim for at least 150 minutes of moderate exercise each week.

4. Eat more like the Mediterranean diet

• More vegetables, fruit, fish, olive oil, nuts, and beans.
• Less refined carbs, sugar, and processed food.
• 25 to 35 grams of fiber a day.

5. Add omega-3 fats

Take 1 to 3 grams a day of EPA and DHA, from fatty fish or a supplement. This can lower inflammation markers, including hs-CRP.

6. Treat gum disease

Regular dental cleanings and gum treatment can lower a surprisingly hidden source of inflammation.

7. Quit smoking and cut back on alcohol

Both steadily lower hs-CRP over weeks to months.

8. Manage stress

Meditation, breathing exercises, time with people you love, and enough rest all measurably lower inflammation.

9. Fix a vitamin D deficiency

Vitamin D helps regulate your immune system. Correcting a deficiency may lower hs-CRP, especially if your level was very low to start.

Most people see real change in hs-CRP within 8 to 12 weeks of these changes.

If your last checkup skipped it, you can book a &you Labs panel and get hs-CRP tested along with your full heart profile.

Common patterns doctors see

Pattern 1: Heart-disease-level inflammation

• hs-CRP: 2 to 8 mg/L, seen on more than one test.
• Often paired with high ApoB and metabolic syndrome. Metabolic syndrome is a cluster of risk factors, including high blood sugar and high blood pressure.
• What to do: work on the lifestyle drivers, and talk to a doctor about whether a statin makes sense for you.

Pattern 2: Belly-fat-driven inflammation

• hs-CRP: 2 to 5 mg/L.
• High triglycerides, low HDL, the "good" cholesterol.
• Waist size above 90 cm for men or 80 cm for women.
• What to do: losing belly fat is your highest-leverage move.

Pattern 3: Short-term spike

• hs-CRP over 10 mg/L.
• Recent illness, injury, or vaccine.
• What to do: retest in 4 to 6 weeks once you feel normal again.

Pattern 4: Optimal

• Under 1 mg/L on repeat tests.
• Generally a good sign for your heart.
• What to do: keep doing what you are doing, and recheck yearly.

Why hs-CRP is often left out of standard checkups

Cost is the main reason. hs-CRP adds a small amount to the price of a panel. Many insurance-paid checkups are built around the cheapest set of tests that still qualify. Doctors widely agree the test is useful. It just has not caught on everywhere yet.

For most adults, adding hs-CRP to a yearly panel is one of the most useful upgrades you can make.

Where hs-CRP fits into a full heart health check

hs-CRP is one part of a bigger picture of your heart health. A &you Labs panel checks heart and vascular markers alongside markers for weight, hormones, and more. You can see the full list of what a &you Labs panel covers. Every result shows both the standard lab range and the healthy target range, with a doctor's written interpretation.

Frequently asked questions

Is hs-CRP the same test as regular CRP?

They measure the same substance. But hs-CRP is far more sensitive at low levels, which is what matters for heart disease risk. If you want a heart-health reading, ask for hs-CRP specifically.

Can my cholesterol be low but my hs-CRP still be high?

Yes, and this combination carries more risk than low cholesterol alone would suggest. This is one of the main reasons doctors test both together.

Will my doctor act on a high hs-CRP result?

Many will, especially doctors who focus on heart disease prevention. Bring your result to your doctor and ask about a 12-week plan to lower it, with a retest afterward.

How fast can hs-CRP change?

Faster than you might expect. Many people see meaningful drops within 8 to 12 weeks of steady lifestyle changes. Some see change as early as 6 weeks with major diet and exercise shifts.

Should I retest if my hs-CRP comes back high?

Yes. Retest once any recent illness has cleared, to confirm the high result is not just temporary. Then retest again after 12 weeks of changes to see if they are working.

Key takeaways

• hs-CRP measures hidden, long-term inflammation in your body.
• A high level raises your heart disease risk, separate from cholesterol.
• Doctors see under 1 mg/L as optimal. Over 3 mg/L, on repeat tests, is the high range tied to heart risk.
• Losing belly fat, sleeping better, exercising, and eating well can lower it in 8 to 12 weeks.
• If your last checkup skipped hs-CRP, ask for it at your next one.