What Is Inflammation, and How Does It Affect Your Heart?

Updated July 2026

Inflammation has become one of the most talked-about words in health, and one of the most misunderstood. Some people now blame heart disease on inflammation alone and wave away their cholesterol numbers as a result. That's a mistake. Inflammation matters enormously, but it's one piece of the puzzle, not the whole thing, and understanding how it actually fits changes what you do about it.

What does inflammation have to do with heart disease?

It's the body's response to the damage that builds arterial plaque. About 20 years ago, researchers found that people with high levels of inflammation, measured by a blood marker called high-sensitivity C-reactive protein (hs-CRP), were more likely to have a heart attack or stroke. That makes biological sense. When cholesterol accumulates in an artery wall, the body treats it as an injury and sends in inflammatory cells which release hs-CRP. Look at a plaque deposit under a microscope and you'll find not just cholesterol but those inflammatory cells, and the more actively the plaque is growing, the more of them arrive, releasing more hs-CRP into the bloodstream.

The danger is what that inflammation does to the plaque. Inflammatory cells make deposits less stable and more likely to rupture. When plaque ruptures, the body forms a blood clot at the site, and that clot is what causes the catastrophe. Block an artery to the heart and you have a heart attack. Send a clot fragment to the brain and you have a stroke. So elevated hs-CRP is a genuine warning sign of unstable, dangerous plaque.

So is inflammation the real cause of heart disease?

No, and this is the misconception worth clearing up. Inflammation is the symptom, not the cause, of plaque formation. If plaque keeps building, you can't fully switch off the inflammatory response no matter how many anti-inflammatory drugs or supplements you take, because the body keeps responding to the underlying damage. This is why it troubles me when patients discount a high cholesterol reading by declaring that "inflammation is what really matters."

It ALL matters.

Blood pressure matters, blood sugar matters, weight matters, inflammation matters, and cholesterol matters. Cholesterol is one of the best-studied risk factors we have, with a nearly linear relationship between LDL levels and heart risk across populations. Singling out one marker and ignoring the rest is like judging a meal by a single nutrient.

How do you actually lower inflammation?

By reducing what's driving the plaque in the first place, and the fixes overlap. Here's the good news hidden in all of this: because inflammation is a response to plaque, everything you do to slow plaque formation also tamps down inflammation. Lower your LDL cholesterol, and inflammation falls too.

The core moves are the familiar ones, and they work on both fronts at once: eat a whole-food, mostly plant-based diet, don't smoke, and exercise regularly. Statins are worth a mention here too, because researchers believe they lower inflammation as well as LDL, which is likely part of why they're so protective in people who already have significant plaque.

The specific foods that fuel or fight inflammation, the role of the hs-CRP blood test, and even a new anti-inflammatory medication are worth understanding in their own right, which is why I've written a closer look at inflammation as a cardiovascular risk factor and how to lower your CRP. And for the two drugs people most often ask me about in this context, see whether NSAIDs are safe for your heart and whether you should take a daily aspirin.

The problems are complex, but the foundation is simple: eat well, don't smoke, move your body, and use medication when it's genuinely needed. Just don't let anyone convince you it all comes down to a single culprit or a single number. This is exactly the thinking behind Step One Foods: real, whole-food ingredients that work on cholesterol and inflammation at the same time.

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