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Are vegetarian diets an effective alternative, or complement, to drugs and surgery? Although studies designed to answer this question are limited in number and small in size, their results are encouraging. In 1990, Dr. Dean Ornish demonstrated that a very low-fat vegetarian diet (less than 10 per cent calories from fat) and lifestyle changes (stress management, aerobic exercise, and group therapy) could not only slow the progression of atherosclerosis, but significantly reverse it. After one year, 82 per cent of the experimental group participants experienced regression of their disease, while in the control group the disease continued to progress. The control group followed a “heart healthy” diet commonly prescribed by physicians that provided less than 30 per cent calories from fat and less than 200 milligrams of cholesterol a day. Over the next four years, people in the experimental group continued to reverse their arterial damage, while those in the control group became steadily worse and had twice as many cardiac events. In 1999, Dr. Caldwell Esselstyn reported on a twelve-year study of eleven patients following a very low-fat vegan diet, coupled with cholesterol-lowering medication. Approximately 70 per cent experienced reversal of their disease. In the eight years prior to the study, these patients experienced a total of forty-eight cardiac events, while in over a decade of the trial, only one non-compliant patient experienced an event.
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Vesanto Melina (Becoming Vegetarian, Revised: The Complete Guide to Adopting a Healthy Vegetarian Diet)