Heart disease remains the top cause of death in the United States. For decades, since the 1950s, cholesterol levels have been a central focus in assessing an individual’s risk of heart disease. You can easily check these levels through routine blood tests at your doctor’s office.
However, recent evidence from the last twenty years suggests that a biomarker known as C-reactive protein, which indicates low-grade inflammation, might actually be a more reliable predictor for heart disease risk than cholesterol levels.
In light of this, the American College of Cardiology put forth new guidelines in September 2025, recommending that all patients should have their C-reactive protein levels screened alongside traditional cholesterol tests.
What is C-reactive protein?
C-reactive protein is produced by the liver in response to various factors like infections, tissue damage, and chronic inflammation from conditions such as autoimmune diseases, obesity, and diabetes. It primarily serves as an inflammation marker, signaling immune system activity within the body.
This biomarker can also be easily assessed through blood work. A low C-reactive protein level, below 1 milligram per deciliter, generally indicates minimal inflammation, which is good news for heart health. Conversely, a level above 3 milligrams per deciliter shows increased inflammation and correlates with a higher risk of heart disease. It’s estimated that around 52% of Americans have elevated C-reactive protein levels.
Research indicates that C-reactive protein is a stronger predictor for heart attacks and strokes than the so-called “bad” LDL cholesterol or lipoprotein(a), another genetic marker. Notably, one study found that C-reactive protein can predict heart disease risk as effectively as blood pressure can.
Why does inflammation matter in heart disease?
Inflammation is fundamental throughout the process of plaque buildup in the arteries, ultimately leading to atherosclerosis, which can trigger heart attacks and strokes. When a blood vessel gets damaged—say, from high blood sugar or cigarette smoke—immune cells rush to the site. These cells then engulf cholesterol particles floating in the bloodstream, leading to the formation of fatty plaques within the arteries.
This ongoing process can carry on for decades. Eventually, immune mediators may rupture the cap over these plaques, causing a blood clot that can block blood flow, suffocating surrounding tissues and potentially causing a heart attack or stroke.
This reveals that while cholesterol plays a role, it is actually the immune system driving each step in the development of heart disease.
Can diet influence C-reactive protein levels?
Lifestyle choices significantly affect how much C-reactive protein the liver produces. Some foods and nutrients are known to lower these levels, such as dietary fiber from beans, vegetables, nuts, and seeds, as well as berries, olive oil, green tea, chia seeds, and flaxseeds.
Furthermore, weight loss and regular exercise can also contribute to reduced C-reactive protein levels.
Does cholesterol still matter for heart disease risk?
Even if cholesterol isn’t the most critical risk factor for heart disease anymore, it still holds relevance. The focus isn’t solely on the total amount of bad cholesterol, but rather on the number of particles in which this cholesterol is contained. Simply having the same cholesterol level doesn’t mean two individuals face the same risk; more particles typically indicate a higher risk.
That’s where the apolipoprotein B test comes into play. It measures cholesterol particles and serves as a more effective risk predictor than simply measuring total bad cholesterol.
Similar to C-reactive protein, apolipoprotein B levels can be influenced by lifestyle choices such as exercise and diet. Certain nutrients like fiber, nuts, and omega-3 fatty acids can lower the number of cholesterol particles, while increased sugar intake has the opposite effect.
What’s the best way to prevent heart disease?
Heart disease stems from a multitude of interconnected risk factors accumulated over time. As such, prevention is a far more intricate process than merely avoiding cholesterol-rich foods, as once believed.
Understanding your levels of LDL cholesterol alongside C-reactive protein, apolipoprotein B, and lipoprotein(a) gives a broader perspective on your risk. This knowledge is essential for motivating long-term commitments to heart disease prevention practices. Prioritizing healthy eating, consistent exercise, adequate sleep, effective stress management, maintaining a healthy weight, and if applicable, quitting smoking can all contribute to better heart health.
