"Experts Warn Against Raw, Low-Carb, and Supplement-Heavy Diets"

The raw food diet has been ranked as the worst diet for the second consecutive year by US News & World Report, with experts citing its excessive restrictions and potential nutritional deficiencies. Other diets criticized for being unhealthy include the low-carb Dukan diet and supplement-based plans like Slimfast and Herbalife. Red flags for an unhealthy diet include too much restriction and the elimination of whole food groups. The keto diet, previously ranked poorly, has moved up slightly due to recent research acknowledging its potential benefits for diabetes and weight management, despite its high-fat content and exclusion of certain healthy foods.