Resolving the Coronary Artery Disease Epidemic through Plant-Based Nutrition
Caldwell B. Esselstyn, Jr., MD
From the Cleveland Clinic Foundation, Cleveland, OhioCaldwell B. Esselstyn, Jr., MD
The Cleveland Clinic Foundation
9500 Euclid Avenue, Desk A80
Cleveland, Ohio 44195
2001; 4: 171-177
Autopsy data from the conflicts in Korea 2 and Vietnam 3 the Bogalusa study,4 and the PDAY5 study all testify to the ubiquitous nature of the disease in young Americans. Recently, intra-arterial ultrasonography confirmed that “normal” segments in patients with coronary artery disease also have diffuse symmetrical atherosclerosis, which is not yet disfiguring the intra-luminal diameter and thus is invisible to angiography.6 This work is further confirmation of the Roberts autopsy data, which demonstrates that essentially all patients with ischemic heart disease have triple vessel involvement.7
However, coronary artery disease is virtually absent in cultures that eat plant-based diets, such as the Tarahumara Indians of northern Mexico,8 the Papua highlanders of New Guinea,9 and the inhabitants of rural China10 and central Africa.11 Hundreds of thousands of rural Chinese go for years without a single documented myocardial infarction.10
Modern North America and Europe pride themselves on having the world’s most advanced medical care. What are these health-care systems doing about coronary artery disease?
Present Heart Disease Management Strategies
The present strategy focuses on interventional procedures and risk-factor modification. This approach is strictly a defensive strategy. It is pressing the limit of what society can afford. Our present cardiology budget exceeds one-quarter of a trillion dollars per year.1 Millions of symptomatic patients – generally those with arterial stenosis of more than 70% – have had interventions such as bypass, angioplasty, stenting, or atherectomy.13 Unfortunately, these interventions are accompanied by significant morbidity, mortality, and expense, provide only temporary benefit, and do nothing for patients at greatest risk for myocardial infarction, those with juvenile plaques of 30% to 50% stenosis, which are the ones most prone to rupture.14 As Forrester states, “angiography does not identify and interventional strategies don’t treat those lesions most likely to cause a heart attack.”15Therapies involving diet and lipid-lowering medication are not ignored by our health-care leaders, but sadly, their recommendations are clearly inadequate. The American Heart Association and the National Cholesterol Education Program (NCEP) recommend consumption of not more than 30% dietary fat and cholesterol levels below 200 mg/dL; numerous studies confirm that people who adhere to these recommendations experience not arrest and reversal of their heart disease, but rather continued disease progression.16 A question arises whether these recommendations expose millions to disease development and progression. However, because of the general respect commanded by these organizations, many doctors and patients perhaps are misled, trusting that following their recommendations will protect against heart disease.
The newer NCEP clinical guidelines, known as the Adult Treatment Panel 111, suggest broadening the identification of those at risk. This will mandate that millions of Americans take cholesterol-reducing drugs as well as make some dietary and physical activity adjustments. This is a rear-guard, after-the fact approach. It tacitly acknowledges that our food environment is so toxic that millions will become at risk and develop disease. As will be discussed, it is preferable to advise the public to avoid the categories of food that cause atherosclerotic disease.37The National Research Council, in its 1989 report “Diet and Health,” 17 recommended an upper limit of total cholesterol of 200 mg/dL and 30% dietary fat, even though “a number of the scientists felt that a greater reduction would confer additional health benefits.”17 However, the committee felt that setting the cut-off too low would merely frustrate the public. The council also surmised, incorrectly, that if the upper level were set at 200 mg/dL, most Americans would achieve a total cholesterol level of 150 mg/dL or less.17 That has not happened. Most Americans and their physicians feel “safe” with a cholesterol total of up to 200 mg/dL. They are not. In the Framingham study, 35% of ischemic heart disease occurred in patients with total cholesterol levels between 150 and 200 mg/dL.18 In the CARE study, the average total cholesterol level in patients with a history of heart attack was 209 mg/dL.19 In contrast, the American Cancer Society recommends no more than 20% dietary fat,20 while the World Health Organization prefers no more than 15%.21
Dr. Scott Grundy, chairman of the NCEP, proclaimed approximately 14 years ago22 that 90% of heart attacks could be prevented if the population’s cholesterol was 150 mg/dL or less – a figure identical to that hoped for by the National Research Council in 1989. However, neither the NRC, the American Heart Association, or the NCEP is on record to show precisely what diet will achieve the goal of cholesterol of 150 mg/dL. The basic diet favored by these groups contains not only grains, legumes, vegetables, and fruit, but also oil, low-fat milk and milk products, butter, cheese, poultry, lean meat, and fish. I am unaware of any research proving that by eating such a diet one can achieve a cholesterol level of 150 mg/dL or avoid coronary artery disease.The Mediterranean diet and monounsaturated oils have become unjustifiably popular because of the Lyon Diet Heart Study.23 This approach is difficult to accept. No studies of monounsaturated oils have shown them to arrest and reverse coronary disease. The Lyon study did show a slower rate of progression, but this is hardly an acceptable goal. In a study of patients with coronary disease, Blankenhorn actually showed the reverse, that disease progressed as rapidly in patients on a monounsaturated diet as it did in those on a saturated fat diet.24 Rudel demonstrated a similar result in African green monkeys over a 5-year period.25 Particularly compelling was his finding that disease in the two groups was equivalent, even though the monounsaturated group had higher HDL, lower LDL, and more favorable LDL-to-HDL ratio. He recently replicated the results in rodents.26
The number of heart attacks continues to increase every year.27 Although the age-adjusted death rate for heart disease has declined, the decline may be artifactual.12 Stamler found deaths from cardiovascular disease approached 40% of those dying in a group of 80,000 young men with follow-up ranging from 16-34 years. The data confirmed a continuous graded relationship of serum cholesterol level to long term risk of coronary heart disease, cardiovascular disease, and all cause mortality. They also demonstrated substantial absolute risk and increased excess risk of coronary heart disease and cardiovascular disease death for younger men with elevated cholesterol levels and conversely a longer estimated life expectancy for younger men with favorable lipids.35 Our stop-gap, device-driven, risk factor-oriented approach is not working. Why? Because it fails to address our toxic food environment, which is responsible for the disease. It is focused only on those who are already ill or whose elevated lipids reflect an inability to detoxify their American diet. What are the other alternatives?
Taking the Offensive
As I have reported earlier,28,29 a plant-based diet in conjunction with cholesterol-reducing medication eliminated progression of coronary artery disease over a 12-year period in patients with triple-vessel disease. Most of the 18 patients had experienced an earlier failed intervention of bypass surgery or angioplasty. All patients who maintained the diet achieved the cholesterol goal of less than 150 mg/dL and had no recurrent coronary events during the 12 years. At 5 years, angiography was repeated in most cases. By analysis of the stenosis percentage none had progression of disease, and 70% had selective regression.28 These data are compelling when one considers that the same group had experienced more than 49 coronary events during the 8 years before this study.28The recent case of a colleague is particularly telling. During September and October of 1996, a 44-year-old surgical colleague experienced occasional chest discomfort, yet neither electrocardiogram, stress echocardiography, or thallium scanning found evidence of disease. While eating the typical American diet, he had a total cholesterol of 156 mg/dL and an LDL of 97 mg/dL. He was lean, non-diabetic, and normotensive, did not smoke, and had no family history of coronary disease. His lipoprotein (a) and homocysteine levels were normal. On November 18, 1996, after his surgical duties, he became acutely ill with pain in the left arm, jaw, and chest. Immediate coronary catheterization found all vessels to be normal except for the left anterior descending artery, the distal third of which was diseased. Enzymes confirmed a myocardial infarction. However, no intervention was deemed appropriate.
This patient was aware of my ongoing study and was curious for more information. He and his wife consulted me for an in-depth review of the plant-based diet and techniques of this arrest and reversal study. He became the personification of commitment to the plant-based diet. Over the next 32 months, without cholesterol-lowering drugs, he maintained a mean total cholesterol of 89 mg/dL and an LDL of 38 mg/dL. The repeat angiogram 32 months after his infarction showed that the disease was completely reversed. (Fig.1)
Even though many people might find a plant-based diet initially difficult to follow, every patient with the diagnosis of coronary artery disease should at the least be offered the option of this potentially curative arrest and reversal approach. As this young surgeon’s case illustrates, our plant-based diet approach can achieve total disease arrest and selective regression even in advanced cases. This approach is particularly compelling because patients can take control over the disease that was destroying them. If traditional interventional cardiology is a rear-guard action, our arrest and reversal therapy can be likened to a military offensive against atherosclerosis.
Limitations of this study are its modest number of participants and lack of comparable controls. Nevertheless, its size permitted the caregiver an opportunity for frequent patient encounters. These interactions enabled 75% of participants to achieve profound lipid reduction, dietary goals, and relief of symptoms which continued to improve throughout the study’s 12-year duration. Patients essentially served as their own controls often achieving profound angiographic reversal of disease as reviewed in the angiographic core laboratory. Fig. 1-4
New recommendations for a healthy diet
The expert faculty at the First National Conference on the Elimination and Prevention of Coronary Artery Disease have issued a new set of recommendations:30
This diet minimizes the likelihood of stroke, obesity, hypertension, type II diabetes, and cancers of the breast, prostate, colon, rectum, uterus, and ovary. There are no known adverse effects of such a diet when mineral and vitamin contents are adequate.
At the 1999 national cholesterol summit meeting, Dr. William Castelli was asked what he would do to reverse the coronary artery disease epidemic if he were omnipotent. His answer: “Have the public eat the diet of the rural Chinese as described by Dr. T. Colin Campbell,” author of the Cornell China study (personal communication, William Castelli, Sept. 2-3, 1999). A recent prospective study of diet quality and mortality in more than 40,000 women confirms the benefits of consuming a diet high in fruits, vegetables, and grains.31
At a recent national meeting on hypertension, the original DASH study32 was updated.33 It was found that a diet emphasizing grains, vegetables, and fruit (and including low fat dairy and lean meat), with particular attention to reducing sodium intake, resulted in blood pressure reductions equivalent to those produced by hypertension drugs. 33
In addition, Dr. Dean Ornish has reported both 1- and 5-year data that support a plant-based approach to control coronary artery disease.16
Replace the “Food Pyramid”
An integral part of this offensive must be to eliminate the toxic food environment. Look at the so-called Food Guide Pyramid, the familiar geometric symbol used to promote the recommendations by the U.S. Department of Agriculture and the Department of Health and Human Services. It is laden with dairy products, animal products, and oils, which are the essential building blocks for coronary artery disease. In addition, from a design standpoint, the choice of a pyramid is potentially confusing and misleading. Some viewers may be led to believe that the foods at the top (meats, sweets, and fatty foods) are the most helpful, when in fact they are the most harmful. To avoid such sources of confusion, we should eliminate geometric figures and promote 3 simple food categories: safe, condiments, and unsafe.
Safe: grains, legumes, lentils, vegetables, and fruits
In addition, we should recommend dietary supplementation with a daily multivitamin, and, for those over 50 years old, an additional 1,000-1,200 mg calcium and 600 to 800 IU of Vitamin D. These recommendations are in concert with those of the expert faculty from the First National Conference on the Elimination of Coronary Artery Disease.30
Why are the current recommendations so weak?
When dietary recommendations are issued with the stamp of approval of the U.S. government, the public should be able to trust that these recommendations accurately guide them to foods that are unlikely to cause disease and away from those that are known to cause harm. Thus, any group promoting dietary guidelines for the public should make its decisions based on science. However, the USDA has been subjected to intensive industry lobbying, which compromises its capacity to be fair and objective.34 At the least, neither the experts who testify before the committee nor the committee members themselves should have relationships, financial or otherwise, to the food industry. These same rules regarding conflict of interest should apply to scientists who lead or are members of the National Cholesterol Education Program and the Food and Nutrition Section of the American Heart Association.
As recently as October, 2000, the Physicians Committee for Responsible Medicine successfully litigated the USDA to ascertain the compensation sources of the US Dietary Guidelines Committee. Six of the eleven committee members, including the chairman, had relationships to the meat, dairy, or egg industry. 36 Such conflict insures a perception that the American public and school children will not receive an unbiased recommendation of what constitutes the healthiest food choices. The USDA, by definition, a protector of the agriculture industry should disqualify itself from this responsibility, which more correctly may belong in the Centers for Disease Control.
The present device-driven, risk factor-identification, rear-guard strategy diagnoses disease after the fact and offers no promise of preventing disease or controlling its progression. We are fortunate to possess the knowledge of how to prevent, arrest, and selectively reverse this disease. However, we are not fortunate in the capacity of our institutions to share this information with the public. The collective conscience and will of our profession is being tested as never before. Ties to industry and politics result in conflict within our private and governmental health institutions, compromising the accuracy of their public message. This is in total violation of the moral imperative of our profession. The time is now for us to have the courage for legendary work. Science and not the messenger must dictate the recommendations.