"Any diet will do ya!" ... For weight loss, that is
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This meta-analysis assessed the effectiveness of 10 weight loss diets including Atkins, Weight Watchers, Jenny Craig, and Ornish, using another diet or no dietary intervention as comparators. The 48 RCTs included 7,286 overweight or obese adults and analysis was adjusted for the degree of behavioral support and exercise. All studies were at least 3 months long.
Evidence Based Practice 18(9): 4