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GM Diet: Effectiveness, Implications, Pros and Cons

Image shows gm diet planning. Healthy food for weight loss
Samyak Lalit
Samyak Lalit | September 15, 2023 (Last update: September 15, 2023)

Samyak Lalit is an author and disability rights activist. He is a polio survivor and the founder of projects like Kavita Kosh, Gadya Kosh, TechWelkin, WeCapable, Dashamlav and Viklangta Dot Com. Website:

The General Motors Diet, commonly known as the GM Diet, has been a subject of fascination and debate ever since its introduction in the late 20th century. Purportedly developed by General Motors for its employees, the diet has gained considerable attention due to its promise of rapid weight loss in just seven days. This article aims to explore the GM Diet in detail, examining its principles, efficacy, health implications, and controversies.

What is the GM Diet?

The GM Diet is a seven-day meal plan aimed at quick weight loss and detoxification. Although the diet was supposedly created in collaboration with the U.S. Food and Drug Administration and the Department of Agriculture, there is no concrete evidence to validate this claim.

The diet involves consuming specific foods each day:

  • Day 1: Fruits (except bananas)
  • Day 2: Vegetables
  • Day 3: Fruits and vegetables
  • Day 4: Bananas and milk
  • Day 5: Meat and tomatoes
  • Day 6: Meat and vegetables
  • Day 7: Brown rice, fruits, and vegetables

Principles Underlying the Diet

Caloric Deficit

The fundamental principle behind the GM Diet is the caloric deficit, which occurs when the calories burned are more than the calories consumed. The diet imposes a sharp caloric restriction, which is believed to result in rapid weight loss.

Food Group Focus

Each day of the GM Diet focuses on specific food groups, from fruits to meats, aiming to diversify nutrients while still maintaining a calorie deficit.


The GM Diet also purports to detoxify the body. Fruits and vegetables are rich in water, fiber, vitamins, and antioxidants, which might help remove toxins.

Efficacy: Does it Work?

Weight Loss

People following the GM Diet often report significant weight loss, sometimes up to 15 pounds in one week. However, the loss is often attributed to water weight and muscle mass instead of fat loss.

Nutrient Intake

The GM Diet might provide beneficial nutrients on certain days when fruits and vegetables are consumed but fails to offer a balanced nutrient intake over the entire week.

Health Implications


  1. Quick Results: For those looking for rapid weight loss for a specific event, the GM Diet might seem appealing.
  2. Simple to Follow: The diet doesn’t involve complicated meal preparation or calorie counting.


  1. Nutritional Imbalance: The diet lacks essential nutrients and can lead to deficiencies.
  2. Unsustainable Weight Loss: The weight loss is mostly water weight, and most people regain it after returning to a regular diet.
  3. Health Risks: The diet can be risky for people with preexisting conditions like diabetes or heart disease.
  4. Psychological Effects: Such diets can contribute to an unhealthy relationship with food.

Scientific Scrutiny and Controversies

Surprisingly, there has been minimal scientific research to validate the effectiveness or safety of the GM Diet. Moreover, General Motors itself has distanced itself from the diet, adding to the skepticism surrounding it.

Expert Opinions

Nutritionists and healthcare providers usually do not recommend the GM Diet due to its unbalanced nature and potential health risks. It is often considered a fad diet that promises quick results without any scientific backing.


There are various other diets like Intermittent, Mediterranean, Keto, and plant-based diets that are more balanced and have scientific evidence supporting their benefits for weight loss and overall health.


While the GM Diet promises rapid weight loss and detoxification, it’s crucial to consider its potential drawbacks and health risks. The diet lacks scientific validation, essential nutrients, and fails to offer a sustainable weight management strategy. It’s advisable to consult a healthcare provider before undertaking any drastic dietary changes, including the GM Diet.

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