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What is a crash diet?

Dr. Mehmet Oz, MD
Cardiology (Cardiovascular Disease)
Crash diets cut calories drastically. They often restrict entire food groups as well. Such diets can result in rapid weight loss, although that weight is mostly water. That's because to the body a crash diet feels like being starved, and its reaction to starvation is to release water. As soon as you start eating normally again, the water—and the weight—will return.

Beware of any diet that drastically cuts calories, forbids entire food groups (like fruits or grains), includes pills or potions, advises that you eat foods only in certain combinations or tells you to skip meals. In the long run, crash diets won't help you lose weight and keep it off.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.