Can diets be harmful?

the long version

"Can Diets Be Harmful?: Dieting Can Cause Health Problems; Calorie Restriction Improves and Extends Life; Claims that Calorie Restricted Diets Extend Life Are Exaggerated; Vegetarian Diets Help Prevent Disease; Vegetarian Diets Can Be Problematic; Vegetarian Diets Do Not Adversely Affect Athletes; Fad Diets Promote Unhealthy Eating Habits; Fat Acceptance Promotes Well-Being; Fasting and Juice Cleansing Can Heal the Body; Fasting and Cleansing Diets Can Be Physically Dangerous; Broad Eating Patterns Are Healthier than Restrictive Diets; The Emphasis on Dieting Harms Girls; Mothers' Obsession with Dieting Harms Sons as well as Daughters"--