In today’s fast-paced world, millions of people are turning to quick and easy solutions to lose weight. Crash diets, also known as fad diets, have become a popular choice for people looking to shed some pounds quickly. However, while these diets may provide short-term weight loss benefits, it is not at all the best or advisable option for your body.  When you go on a crash diet to lose weight, you expose your body to severe health consequences. In the most severe circumstances, these diets can even put a person’s life or health in jeopardy. So, before embarking on a crash diet journey, it is best to educate yourself on the negative effects of crash diets on your body.

In this blog, we will examine the adverse health effects of following crash diets.

What is a crash diet?

A crash diet is a weight loss plan that promises rapid weight loss by restricting calorie intake to a very low level. Typically, these diets involve severely limiting food intake and eliminating entire food groups, such as carbohydrates or fats. These diets are designed to achieve quick weight loss results but can ultimately have detrimental effects on your mind and body.

Health risks of crash diets

Nutritional deficiencies

For decades, experts have recognised that long-term crash diets can be dangerous, especially when they become a fad. Crash diets severely restrict calorie intake, which can lead to nutritional deficiencies. The body requires a wide range of nutrients to function properly, including vitamins, minerals, and other essential nutrients like potassium, magnesium, and copper. When you follow a crash diet, you may be depriving your body of the nutrition it needs to perform its functions. Investigations have also revealed that diets can cause long-term consequences on your health, including an increased risk of developing chronic diseases.

Slows down metabolism

Given that crash diets can also slow down metabolism, experts stress that very low-calorie diets should only be followed with a doctor’s supervision. When you consume fewer calories than your body requires, your body enters starvation mode, which slows down your metabolism to conserve energy. This can make it difficult to lose weight in the long term as your body adapts to the low-calorie intake and becomes more efficient at storing fat.


Perhaps one of the biggest problems with crash dieting is that severe calorie restriction can lead to dehydration. When you don’t consume enough fluids, your body becomes dehydrated, which can cause a range of health problems. Dehydration can manifest with headache, dizziness, fatigue, and constipation, among other things.

Loss of muscle mass

Some health experts across the world have reported a loss of muscle mass in their patients after undergoing crash dieting. And we all know that when you restrict calorie intake, your body looks for alternative sources of energy, including muscle tissue. This can lead to muscle loss, which can have long-term consequences on your health. Loss of muscle mass can lead to a decreased metabolism, which can make it more difficult to lose weight in the long term.


Crash diets can also increase the risk of developing gallstones. When you lose weight rapidly, your body produces more cholesterol, which can lead to the formation of gallstones. Gallstones can be extremely painful and may require surgery for removal.

Mood changes

Crash diets can also lead to mood changes. When you restrict calorie intake, your body produces less serotonin, which can lead to depression and mood swings. This can make it difficult to maintain the diet in the long term and can have a negative impact on your overall quality of life.

Skin and hair quality issues

The lack of nourishment may be reflected in your hair, causing it to look dull, lank, and dry. If you have been trying to lose weight by starving yourself or eating a lesser amount than your body requires, you may increase the risk of experiencing hair loss. If expert dieticians and nutritionists across the world are to be believed, a crash diet will eventually impact the quality of your skin, leaving it parched and dry.

The bottom line

Crash diets may seem like a quick and easy solution to weight loss, but they come with significant health risks. If you have been trying to lose weight by depriving yourself of food or eating less than what your body needs, you must give it a second thought or consult a professional dietician. The best thing you can do for your health is to take a long-term approach that focuses on sustainable changes to your diet and lifestyle. This will not only help you achieve your weight loss goals but will also improve your overall health and well-being in the long term.

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