According to one GM diet plan website, this diet helps users lose at least 10–17 pounds in 1 week. It claims to promote weight loss by burning calories without affecting mood or energy levels.
However, this plan may exclude essential nutrients, and it might not be a sustainable long-term weight-loss strategy.
In this article, we look at the GM diet in more detail, including how it works and its benefits and risks.
What is the GM diet?
The GM diet consists of a 7-day meal plan. Each day focuses on a specific food or food group.
GM stands for General Motors. Some sources claim that the General Motors corporation developed and endorsed this diet plan to help its employees lose weight.
Does it work?
A smoothie containing banana and skim milk is a snack option on day 4 of the 7-day meal plan.
The GM diet promotes weight loss in several ways, including:
- encourages people to eat more fruit and vegetables, which are healthful, low-calorie foods
- does not allow added sugars or processed foods
- does not permit refined carbohydrates
- lowers people’s daily calorie intake
People following the GM diet are likely to lose weight because it involves taking in fewer calories than a person uses up. However, it is unlikely to be the most healthful way to lose weight.
Each person’s body is different so people may experience different results.
The GM diet plan has several associated benefits and risks.
More fruits and vegetables
One health benefit of the GM diet is that fruits and vegetables are the primary foods. Fruits and vegetables suppress fat accumulation in the body because they are low in calories and high in fiber, which makes people feel fuller for longer.
Fewer added sugars
The GM diet does not allow added sugars in either foods or beverages, including alcohol.
People in the United States generally eat and drink more sugar than is healthful. Research has identified links between diets high in added sugars and a range of health conditions, including obesity, heart disease, and type 2 diabetes.
The Centers for Disease Control and Prevention (CDC) recommend that people limit their daily intake of added sugars to less than 10 percent of their total daily calories.
Other reported benefits
Some sources also claim that those who follow the GM diet will experience a variety of other impressive results, such as:
- improved quality and appearance of the skin
- enhanced mood
- better digestion and metabolism
- curing irritable bowel syndrome and constipation
However, it is important to note that there is a lack of research to support these claims.
Although the idea of substantial weight loss within a short period may seem attractive, the GM diet does come with risks.
Lacks important nutrients
People following the GM diet may not get enough of certain important food groups, such as healthful fats and protein. Their diet may also lack essential vitamins and minerals that come with eating a wide variety of healthful foods.
While the trans fats that are present in many fried and baked foods can raise cholesterol and cause health problems, a person’s body needs healthful unsaturated fats to function.
Unsaturated fats, such as those in salmon, avocados, and walnuts, help improve cholesterol and also offer other health benefits.
Research suggests that high-protein diets promote weight loss and lower cholesterol and blood glucose levels. Such diets may also reduce feelings of hunger and have beneficial effects on the body’s metabolism. People following the GM diet may not get enough protein.
Short-term weight loss
The GM diet is not suitable as a long-term diet strategy, meaning that a person may regain weight once they stop following the diet.
One reason for this is that the diet does not necessarily teach techniques for healthful cooking or eating, and these techniques are essential for long-term weight maintenance.
Short-term diet plans are less effective for weight-loss maintenance than adopting long-term lifestyle changes, such as increasing exercise levels and cooking with a range of healthful ingredients.
Other risks that one GM diet website lists include:
- muscle weakness
- poor physical performance during exercise