@Perfect10 I have just read this in vol 153 of Preventative Medicine (December 2021):
Highlights
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The number of Americans dying of heart disease has been steadily climbing while the number with high cholesterol has been gradually falling.
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Current guidelines recommend aggressive reduction of LDL-C to prevent coronary heart disease, but new research suggests that other factors may be far more important in the pathogenesis of coronary heart disease.
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Despite the widespread utilization of cholesterol-lowering statins in Europe, there has been no accompanying decline in coronary heart disease deaths.
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The totality of new evidence compels us to question why our current approach to heart disease prevention through targeted reductions of LDL-C is not working.
Later it says this:
The cholesterol hypothesis, which posits that lowering serum cholesterol reduces the risk of cardiovascular disease, is the foundation of current guidelines for the prevention of atherosclerotic cardiovascular disease (
Grundy et al., 2019). The Framingham Heart Study is often cited for identifying high blood cholesterol, specifically low-density lipoprotein cholesterol (LDL-C), as a risk factor for coronary heart disease (CHD), the principal cause of heart deaths.
Yet in the original 1996 report, Framingham director Dr. William Castelli concluded, “…. unless LDL levels are very high (300 mg/dl (7.8 mmol/l) or higher), they have no value, in isolation, in predicting those individuals at risk of CHD.” (Castelli, 1996) Despite this conclusion, modestly elevated levels of LDL-C are commonly viewed as a causal factor for CHD and the aggressive reduction of LDL-C is routinely recommended for both primary (moderate and high-risk individuals) and secondary prevention (
Grundy et al., 2019). However, some recent studies are challenging whether LDL-C should be regarded as a primary risk factor.
The Women's Health Study of 28,014 women, for example, found that lipoprotein insulin resistance was the strongest biochemical marker for premature CHD (6.40 adjusted HR) compared to LDL-C (1.38 adjusted HR) (Dugani et al., 2021). The study concluded, “In this cohort study, diabetes and insulin resistance, in addition to hypertension, obesity, and smoking, appeared to be the strongest risk factors for premature onset of CHD.” (Dugani et al., 2021) Similarly, the PREDIMED study of 6901 participants concluded that, “remnant cholesterol, not LDL-C, is associated with incident cardiovascular disease.” (Castañer et al., 2020) LDL-C is also conspicuously absent from the Pooled Cohort Equations currently recommended for estimating atherosclerotic cardiovascular risk in the most recent American Heart Association/American College of Cardiology cholesterol guidelines (
Grundy et al., 2019).
I attempt to post the link to the article here: https://www.sciencedirect.com/science/article/pii/S0091743521003601