There's more evidence that alternative medicine guru Dean Ornish's controversial low-fat, vegetarian diet works to reverse heart disease.

A follow-up study in today's Journal of the American Medical Association showed that heart patients on the diet program did even better in keeping their coronary arteries open after five years than they had done after just one year on the plan. By contrast, those in a control group were doing worse after five years than they did after one year.

After five years, those on the Ornish program had an average 8 percent improvement in the blockages of their coronary arteries, compared to those in the control group, who, on average, showed a 28 percent worsening.