Any eating regimen that recommends snacking on bacon can’t be taken seriously as a health-selling manner to consume.” Dean Ornish, MD, is a bestselling author and scientific professor of medicine on the University of California, San Francisco. His South Beach Keto Diet weight loss program — low in fats, animal protein, and delicate carbs — positioned 9th within the ratings. Ornish says he spent years debating Atkins, whom he nevertheless calls a “threat.” “