Crash diets, such as the Military Diet, “help you lose weight quickly, up to 10 pounds (4.5kg) in a week,” Healthline explained.

The Military Diet, also called the three-day diet, is a short-term, calorie-restricted meal plan followed by four days off.

Healthline states: “Followers of the diet are told to repeat the weekly cycle for up to one month, or until they reach their goal weight.

“Because it follows on-and-off calorie restriction, the Military Diet is a form of intermittent fasting. Intermittent fasting diets are characterised by shifting between periods of reduced calorie intake and periods of unrestricted feeding.”

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Source: Daily Express | Diet