Milly Gaines
A high-carb diet is one where the majority of calories come from carbohydrates. However, this does not mean that all carbohydrates are healthy. The type of carbohydrates consumed is more important than the quantity. Whole grains, fruits, and vegetables are examples of good carbs that can help control blood sugar and weight. On the other hand, processed grains and added sugars may increase the risk of obesity, diabetes, and cardiovascular disease. Research suggests that a diet with over 70% carbohydrates is unhealthy and can lead to higher mortality rates. Carb cycling, which involves varying carb intake, is another approach that may help with fat loss and physical performance.
| Characteristics | Values |
|---|---|
| Definition | A high-carb diet means the majority of your calories come from carbohydrates. |
| Carbohydrate sources | Fruits, vegetables, legumes, whole grains, cakes, cookies, and ice cream. |
| Recommended daily intake | According to the FDA, a 2,000-calorie diet should include under 275 grams of carbohydrates, which is 55% of the daily calorie intake. |
| Health benefits | Decreased risk of heart disease, certain types of cancer, improved insulin sensitivity, and decreased inflammation. |
| Health risks | Increased risk of weight gain, obesity, diabetes, cardiovascular disease, and metabolic syndrome. |
| Considerations | The type of carbohydrates consumed matters more than the quantity. Highly processed carbohydrates can increase the risk of negative health outcomes. |
| Specific diets | The Specific Carbohydrate Diet (SCD) eliminates grains and grain products and reduces sugar intake to manage inflammatory bowel disease (IBD) and other digestive disorders. |
| Related concepts | Carb cycling involves varying carbohydrate intake daily, weekly, or monthly to optimise physical performance and fat loss. |
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Health Benefits and Risks
Carbohydrates are one of the three macronutrients, along with fats and proteins, and are the body's primary source of energy. The body will prioritise burning carbohydrates over fats and proteins if it is available. Carbohydrates are found in plant-based foods, such as fruits, vegetables, whole grains, legumes, nuts and seeds. These foods are also good sources of fibre, vitamins, minerals and other health-promoting chemicals.
A high-carb diet means that the majority of calories come from carbohydrates. A 2015 study showed that a high-carbohydrate diet resulted in a significant increase in total body weight and BMI in young men. However, a 2018 study found that a plant-based high-carb, low-fat diet had beneficial effects on weight and body composition. The 2018 study also found that a high-carb diet did not increase the odds of obesity. This is because not all carbs are equal, and it depends on the types of food chosen. For example, a diet high in processed refined grains and simple sugars can lead to increased hunger and blood sugar spikes. On the other hand, a diet rich in whole grains, fruits and vegetables can be beneficial for health and weight loss due to the high fibre content.
A high-carb diet can have several health benefits, including a reduced risk of heart disease, a reduced risk of certain types of cancer, improved insulin sensitivity and decreased inflammation. Additionally, the Blue Zones project, which studies healthy communities around the world, found that carbohydrate-rich beans were a common food group among these populations. These communities, which include Costa Rica and Okinawa, have some of the longest-lived women in the world, and their diets typically consist of 50-70% carbohydrates.
However, there are also risks associated with a high-carb diet. A diet that obtains over 70% of its calories from carbohydrates has been linked to a higher mortality rate. Additionally, extremely low-carbohydrate diets can lead to a metabolic state called ketosis, and the long-term effects of this are unknown. While the body can function without carbohydrates, achieving and maintaining ketosis may require sacrificing daily fibre and vegetable intake, which are vital for long-term health. Therefore, it is important to choose the right types of carbohydrates and maintain a balanced diet.
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Weight Loss
A high-carb diet means that most of your calories come from carbohydrates. However, this does not mean that you should only eat carbohydrates. While it is possible to lose weight on a high-carb diet, the type of carbohydrates you consume is crucial.
The Right Carbohydrates
The right carbs can help you lose weight. Fibre-rich carbohydrates, for instance, can support a healthy digestive system. Whole grains, fruits, and vegetables are examples of healthy carbohydrates. These foods are more filling and can reduce hunger. According to a 2021 systematic review and meta-analysis, whole grains, when compared to refined grains, increase satiety and reduce hunger.
The Wrong Carbohydrates
On the other hand, a high-carb diet full of processed refined grains and simple sugars can negatively impact your health and weight. These types of carbs are not satisfying, and you will constantly crave sugar. Refined carbohydrates are processed to remove most of the micronutrients and fibre, adding low-nutrient calories to your diet.
The Right Way to Lose Weight
You can lose weight on a low-carb diet, a low-fat diet, or a high-protein diet. However, these diets are often difficult to maintain, and many people regain the weight over time. Instead of focusing solely on carbs, it is important to pay attention to the rest of your diet and ensure you are getting all the necessary nutrients.
Healthy High-Carb Diets
The Mediterranean Diet and the DASH Diet are examples of healthy high-carb diets. These diets derive most of their calories from carbohydrates and have been shown to have positive effects on weight management, chronic disease risk reduction, and longevity. In addition, the Blue Zones project studied the diets of healthy communities and found that beans, a carbohydrate-rich food, were common to all of them.
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Fibre Intake
A high-carb diet does not have to be low in fibre. Fibre is only found naturally in plant foods, so the less processed these plant foods are, the more fibre they typically contain. Whole grains, fruits, and vegetables are good sources of fibre.
A high-fibre, high-carb diet can be beneficial for digestive health. There are two types of dietary fibre: soluble fibre and insoluble fibre, both of which aid digestion. Soluble fibre absorbs water, helping to prevent digestive problems such as constipation and diarrhoea, and providing a food source for certain gut bacteria. Insoluble fibre helps to bulk out waste, aiding quick removal and preventing gastrointestinal blockage and constipation. The recommended average fibre intake for adults is 30 grams per day, but many people do not meet this recommendation.
A high-carb diet that includes whole grains, fruits, and vegetables can help individuals meet their daily recommended fibre intake. For example, the Blue Zones project, which studies the diets of healthy communities around the world, found that beans, a major source of carbohydrates, are also a staple in the diets of some of the healthiest communities. In addition, the women of Okinawa, who are among the longest-lived in the world, derive the majority of their calories from purple and orange sweet potatoes, which can be over 90% carbohydrates.
However, it is important to note that not all high-carb foods are good sources of fibre. Refined carbohydrates are processed in such a way as to remove most of the micronutrients and fibre present in foods like grains. This results in low-nutrient, high-calorie foods that lack the fibre necessary for overall dietary health. Therefore, it is important to choose the right kinds of carbohydrates when aiming for a high-fibre, high-carb diet.
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Calorie Distribution
Carbohydrates are one of the three macronutrients, along with fats and proteins, that provide the body with energy. Carbohydrates are the body's main source of energy, and they are essential for good health and proper organ functioning. The body breaks down carbs into glucose, which is then converted into energy for cells, tissues, organs, and muscles.
When it comes to calorie distribution, the general recommendation is that 45-65% of daily calories come from carbohydrates. This recommendation is supported by various guidelines, including the Dietary Guidelines for Americans and the Institute of Medicine. For a 2,000-calorie diet, the Food and Drug Administration (FDA) suggests a daily intake of 275 grams of carbohydrates, which equates to 1,100 calories or 55% of daily calorie intake. However, it's important to note that calorie requirements may vary depending on factors such as age, sex, and activity level.
Low-carbohydrate diets have gained popularity as a strategy for weight loss. These diets typically involve reducing the overall intake of carbohydrates, with some definitions classifying a very low-carb diet as less than 10% carbohydrates or 20-50 grams per day. While low-carb diets can lead to reduced appetite and calorie intake, facilitating weight loss, they may not be suitable for everyone and can carry risks if not properly managed. It is always advisable to consult with a healthcare professional or dietician to determine the most suitable diet based on individual needs and health parameters.
When considering a low-carb diet for weight loss, it's important to focus on the overall calorie deficit rather than solely reducing carbohydrate intake. This involves understanding daily calorie expenditure and adjusting total calorie intake accordingly. Additionally, while reducing carb portions, it's crucial to prioritize quality foods, such as high-fiber carbs like vegetables, fruits, legumes, and whole grains. By combining a well-planned calorie distribution with a preference for nutritious carbs, individuals can optimize their chances of achieving sustainable weight loss and maintaining good health.
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Carb Cycling
On high-carb days, you would eat a high-carb, low-fat diet, consuming 2-2.5 grams of carbs for every pound of body weight to fuel your activity. On low-carb days, you would eat fewer carbs and be less active, consuming around half a gram of carbs for every pound of body weight.
Before starting a carb cycling diet, it is recommended to consult a doctor or registered dietitian to ensure it aligns with your health and fitness goals. Additionally, it is crucial to choose the right types of carbs, focusing on whole grains, fruits, and vegetables, and avoiding excess added sugars and refined carbs.
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Frequently asked questions
An all-carb diet is one where the majority of calories come from carbohydrates. However, an extreme diet of over 70% carbs is unhealthy.
The Mediterranean Diet and the DASH Diet are tied for first place as the best diets by US News and World Report. Both diets derive the majority of their calories from carbohydrates and have positive effects on weight management, chronic disease risk reduction, and longevity.
A minimally processed high-carb diet has some benefits, including a decreased risk of heart disease and certain cancers, improved insulin sensitivity, and decreased inflammation.
