Some of the best-known fad diets include the following:
- Atkins diet: emphasizes the consumption of low-carbohydrate and high-protein foods
- Ketogenic (keto) diet: severely restricts carbohydrates to induce ketosis
- Paleo (paleolithic) diet: promotes consumption of foods thought to resemble those eaten by early humans
- Grapefruit diet: centers on grapefruit consumption for rapid weight loss
- Juice cleanses and detox diets: claim to remove toxins through fasting or liquid-only regimens
- Liquid diets: replace meals with shakes or beverages to reduce calorie intake
- South Beach diet: limits the intake of certain carbohydrates and fats in phases
- Carnivore diet: consists almost entirely of animal-based foods
- Raw food diet: emphasizes eating uncooked and minimally processed foods