Heart Disease Is Not a Cholesterol Problem. It Is an Inflammation Problem.
The story you have been told about heart disease goes something like this. You eat fat. Your cholesterol goes up. That cholesterol sticks to your artery walls, builds up into plaque, and eventually causes a heart attack. It is a clean, simple narrative. It is also wrong.
The science has been moving away from this model for years. Researchers, cardiologists, and clinicians who look closely at the actual mechanism of cardiovascular disease keep arriving at the same conclusion. Heart disease is a disease of inflammation. Cholesterol is present at the site of plaque not because it caused the damage, but because it was sent there to repair it.
What actually starts the process
Dr. Malcolm Kendrick, a Scottish general practitioner and author of The Clot Thickens and The Great Cholesterol Con, has spent decades studying the mechanisms of atherosclerosis. His argument is detailed and well-referenced. The artery wall gets damaged first. That damage triggers a repair response. Cholesterol, along with clotting factors and other repair materials, is dispatched to the site. Over time, if the damage keeps happening faster than the repair can clear it, plaque accumulates.
The question worth asking is not why cholesterol is present at the site of plaque. The question is what is causing the damage to the artery wall in the first place.
The real inflammatory drivers
Dr. Robert Lustig, a neuroendocrinologist at the University of California San Francisco and author of Metabolical, has spent years documenting how processed food drives chronic inflammation. The specific culprits are not hard to identify.
Refined carbohydrates and added sugars spike blood glucose repeatedly throughout the day. That repeated glucose elevation damages the endothelium, the thin layer of cells lining your blood vessels. Processed seed oils, including canola, soybean, sunflower, and corn oil, are highly unstable, oxidize easily, and generate inflammatory compounds when heated or metabolized. Insulin resistance, which develops over years of high-carbohydrate eating, keeps insulin chronically elevated, and chronically elevated insulin is itself inflammatory.
These are the conditions that damage artery walls. These are the conditions that trigger the repair response that becomes atherosclerosis when it never gets a chance to resolve.
The data that should have changed everything
At least half of people who have heart attacks have cholesterol levels that would be considered normal or even low. A review of more than 136,000 patients hospitalized with coronary artery disease found that nearly half had LDL below 100 mg/dL on admission. What most of them did share was low HDL, a marker strongly associated with insulin resistance and metabolic syndrome.
Gary Taubes, science journalist and author of Good Calories, Bad Calories, has documented in exhaustive detail how the cholesterol hypothesis became entrenched not because the evidence was conclusive, but because it was convenient. It gave researchers a measurable, modifiable target. It gave the pharmaceutical industry a market. The fact that the evidence was always contested got buried under decades of repetition.
The triglyceride to HDL ratio tells a better story
If you want a meaningful signal from your standard bloodwork, look at your triglyceride to HDL ratio. A ratio below 1.5 indicates good metabolic health and a pattern associated with large, buoyant LDL particles that are not linked to cardiovascular risk. A ratio above 3.5 signals insulin resistance, small dense LDL particles, and a metabolic environment that actually does correlate with cardiovascular disease.
This ratio is not perfect. No single marker is. But it reflects the metabolic conditions that drive inflammation, and it does a better job of pointing toward real cardiovascular risk than total cholesterol ever has.
Know what is actually happening in your arteries
If you want to move beyond bloodwork entirely and find out whether you actually have atherosclerosis, ask your doctor about a coronary artery calcium scan. The CAC scan measures calcification in your coronary arteries directly. It tells you whether plaque has formed, not whether a molecule associated with the repair process is circulating in your blood.
Research published in Atherosclerosis confirms that direct assessment is more predictive of coronary artery disease than traditional risk markers. A CAC score of zero means the likelihood of coronary artery disease is extremely low. It costs less than $200 and requires no blood draw.
The diet that addresses the actual problem
A low-carb or ketogenic diet removes the primary inflammatory drivers: refined carbohydrates, added sugars, and the processed seed oils that come packaged with them. It lowers triglycerides. It raises HDL. It improves insulin sensitivity. It reduces the chronic glucose spikes that damage artery walls.
It does not cause heart disease. The evidence suggests it does the opposite.
Disclaimer: This article is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before making changes to your diet, lifestyle, or treatment plan.
References:
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