What is a crash diet and why is it bad? What is a fad diet?

Amy Berger, MS, CNS, is a U.S. Air Force veteran and Certified Nutrition Specialist who specializes in helping people do “Keto Without the Crazy.”™ She has a master’s degree in human nutrition and writes about a wide range of health and nutrition-related topics, such as insulin, metabolism, weight loss, diabetes, thyroid function, and more. She has presented internationally on these issues and is the author of "The Alzheimer's Antidote: Using a Low-Carb, High-Fat Diet to Fight Alzheimer’s Disease, Memory Loss, and Cognitive Decline," and "The Stall Slayer: Seven Roadblocks to Keto Fat Loss and What to Do About Them."