Milly Gaines
Cancer can affect every aspect of your health, including your diet and appetite. Treatments such as chemotherapy and radiation therapy can cause side effects such as constipation, fatigue, and nausea. As such, it is important to maintain a healthy diet during and after cancer treatment. While there is no one-size-fits-all approach to nutrition, and individual needs vary, there is evidence that a low-carbohydrate diet may be beneficial for people living with cancer. This is because carbohydrates with a high glycemic index have been linked to an increased risk of certain types of cancer. Generally, a low-carbohydrate diet is defined as one that contains less than 20 to 120 grams of carbohydrates per day, with some diets recommending even lower amounts.
| Characteristics | Values |
|---|---|
| Carbohydrate intake | 45% to 65% of your daily calorie intake (275g per day for a 2,000-calorie diet) |
| Recommended foods | Vegetables, fruits, legumes, whole grains, beans, peas, lentils, raw or steamed fruits and vegetables, whole grains, low-fat dairy products, lean meat, poultry, fish, nuts, seeds, legumes |
| Foods to avoid | Refined wheat, added sugars, red and processed meats, salty foods, alcohol |
| Weight loss | Modest rate of weight loss (no more than two pounds per week) recommended during treatment for overweight or obese patients, with oncologist approval |
| Other considerations | Age, sex, body composition, activity levels, personal preference, food culture, current metabolic health |
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What You'll Learn
- Carbohydrates are an essential part of a healthy diet, but too many can lead to weight gain and obesity
- Low-carb diets can help to lower blood sugar, blood pressure, and blood insulin levels
- The ketogenic diet is a low-carb diet that may be hard to maintain, but it can help with weight loss
- The Paleo Diet recommends 20% of calories from carbs, with adequate protein and high fat intake
- A healthy diet includes vegetables, fruits, legumes, whole grains, and low-fat dairy products
Carbohydrates are an essential part of a healthy diet, but too many can lead to weight gain and obesity
Carbohydrates are essential to a healthy diet, but opinions vary on how many carbohydrates are optimal. The Dietary Guidelines for Americans recommend that carbohydrates provide 45% to 65% of your daily calorie intake, which is about 275 grams per day on a 2,000-calorie diet. The Academy of Nutrition and Dietetics recommends a similar intake of 50-60% of total calories from carbohydrates.
However, some studies have shown that reducing carbohydrate intake can be beneficial for weight loss and lowering blood pressure, blood sugar, and blood insulin levels. A low-carbohydrate diet is generally considered to be one that contains less than 20 to 120 grams of carbohydrates per day. The ketogenic diet, which has been studied for its effects on cancer, is even more restrictive, recommending less than 50 grams of carbohydrates per day.
It is important to note that the optimal carb intake varies depending on individual factors such as age, sex, body composition, activity levels, and metabolic health. Additionally, a low-carbohydrate diet may not be suitable for everyone, as some people may find it challenging to maintain.
During cancer treatment, dietary needs may change, and it is important to seek advice from a healthcare professional. Weight management guidelines for cancer survivors recommend a combination of caloric restriction, increased energy expenditure through exercise, and behavior therapy. Adequate protein intake is also essential during all stages of cancer treatment, recovery, and long-term survival.
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Low-carb diets can help to lower blood sugar, blood pressure, and blood insulin levels
While there is no official definition of a low-carbohydrate diet, many nutrition professionals would consider less than 40% of total calories from carbohydrates to be low. The ketogenic diet, for example, is considered a low-carb diet, with less than 10% of total calories coming from carbohydrates. The Paleo Diet recommends around 20% of total calories from carbohydrates, or 100 grams per day.
Firstly, carbohydrates have a direct impact on blood glucose. Carbohydrates break down into simple sugars in the body, and these simple sugars turn into glucose through metabolic processes. As a result, blood glucose levels rise, and the body responds by releasing insulin. By reducing carb intake, blood glucose levels can be stabilised, and the body does not have to produce as much insulin. This is especially beneficial for people with insulin resistance, where blood glucose may remain elevated for hours after eating carbs, or for those with type 1 or type 2 diabetes.
Secondly, when insulin levels are high, weight gain is more likely since a main function of insulin is fat storage. Losing fat helps reduce insulin resistance. Therefore, by reducing carb intake, weight loss can be achieved, and insulin resistance can be lowered.
Thirdly, low-carb diets can help to lower blood pressure. This is because a low-carb diet may be the first line of treatment for people who want to avoid medication or who have recently been diagnosed with diabetes. By helping to manage blood sugar and potentially reversing the course of the disease, low-carb diets can contribute to lower blood pressure.
It is important to note that low-carb diets may not be suitable for everyone and can carry some risks, such as vitamin and mineral deficiencies. Anyone considering adopting a low-carb diet should consult with a healthcare professional first.
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The ketogenic diet is a low-carb diet that may be hard to maintain, but it can help with weight loss
The ketogenic diet is a low-carb, high-fat diet that has been around since the 1920s. Initially used to reduce seizures in children with epilepsy, it is now popular for weight loss. The keto diet is all about cutting carbs and eating more fat, which causes your body to enter a metabolic state called ketosis, where it uses fat for energy instead of glucose. This can lead to weight loss and potentially reduce the chance of developing certain health issues.
However, the ketogenic diet may be hard to maintain due to stringent food restrictions. It typically restricts total carbohydrate intake to less than 50 grams a day, which can be challenging as it cuts out many everyday foods such as grains, beans, fruits, and starchy vegetables. Some people may also experience negative side effects, including hunger, fatigue, low mood, irritability, constipation, headaches, and brain fog. In the long term, there are also suggested health risks, including an increased chance of kidney stones and osteoporosis.
Despite these challenges, the ketogenic diet can be effective for weight loss, especially in the short term. A meta-analysis of 13 randomized controlled trials found that the ketogenic diet produced a small but significantly greater reduction in weight compared to a low-fat diet. This may be due to reduced hunger, as the body breaks down fats into molecules called ketones, which serve as an alternative fuel source.
It is important to consult a medical professional before starting the ketogenic diet, as it may not be suitable for everyone and can have side effects. Additionally, it is crucial to focus not only on eating high-fat foods but also on including a variety of allowed meats, fish, vegetables, fruits, nuts, and seeds to ensure adequate intake of fiber and vitamins.
While the ketogenic diet may be challenging, it can be a useful tool for weight loss and improving health when used appropriately and under medical supervision.
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The Paleo Diet recommends 20% of calories from carbs, with adequate protein and high fat intake
While undergoing cancer treatment, it is important to consult a doctor or expert for advice on what foods to eat and avoid. Treatments such as chemotherapy and radiation therapy can cause various side effects, including appetite loss, constipation, fatigue, and nausea. To combat these side effects, it is recommended to eat small meals or nutritious snacks throughout the day, drink plenty of water, and add vegetables and beans to your meals.
The Paleo Diet, also known as the Paleolithic Diet, is a popular eating plan that has gained traction in recent years. It is based on the presumed diet of humans in the Paleolithic Era before the development of agriculture and animal husbandry. This diet typically includes foods such as meat, fish, shellfish, fowl, eggs, tree nuts, vegetables, roots, fruits, berries, and mushrooms. It excludes grains, dairy, legumes, potatoes, sugar, and other refined or processed foods.
The Paleo Diet recommends around 20% of total calories from carbohydrates, which equates to approximately 100 grams per day for a 2,000-calorie diet. This is significantly lower than the standard recommendation from the Academy of Nutrition and Dietetics, which suggests consuming between 50-60% of total calories from carbohydrates. However, it's important to note that the concept of a "low-carbohydrate diet" is relative, and many nutrition professionals consider less than 40% of total calories from carbohydrates to be low.
The Paleo Diet emphasizes adequate protein intake, typically ranging from 20-30% of total calories. This is in contrast to the standard recommendation of 15-20% protein in a "rational diet." By prioritizing protein, the Paleo Diet helps promote satiety and supports the maintenance and growth of muscle mass.
Additionally, the Paleo Diet encourages a high fat intake, typically comprising 35-40% of total calories. This high-fat content is a defining characteristic of the diet and sets it apart from other eating plans. The inclusion of healthy fats, such as those found in nuts, avocados, and certain oils, contributes to increased satiety and the feeling of fullness.
It is worth noting that the Paleo Diet may lead to significant weight loss and improvements in health. However, it also eliminates several food groups that are highly nutritious, including legumes, dairy, and gluten-containing grains. As a result, individuals following this diet may be at risk of developing nutrient deficiencies and experiencing gastric distress during the transition phase.
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A healthy diet includes vegetables, fruits, legumes, whole grains, and low-fat dairy products
A healthy diet is essential for preventing malnutrition and reducing the risk of non-communicable diseases (NCDs). It also plays a crucial role in managing side effects during cancer treatment, such as appetite loss, constipation, diarrhoea, loss of taste, and nausea. A healthy diet includes a variety of whole grains, fruits, vegetables, legumes, and low-fat dairy products, which provide essential nutrients and health benefits.
Whole grains, such as whole wheat, whole oats, whole bulgur, and whole cornmeal, are excellent sources of fibre, iron, and B vitamins. They are also a good source of carbohydrates, which are the body's main source of energy. When choosing grain products, opt for those that are low in saturated fat and added sugar. Refined grains, like white flour and white rice, have a longer shelf life but lack the fibre and nutrients found in whole grains.
Fruits and vegetables are vital components of a healthy diet. It is recommended to consume at least 400 grams or five portions of fruits and vegetables daily. They provide fibre, which aids digestion, and important nutrients. When purchasing fruit, opt for whole fruits over fruit juices to minimise added sugars. For vegetables, include a variety of colours, such as carrots, spinach, and tomatoes, and consider starchy options like corn and potatoes.
Legumes, such as beans, lentils, chickpeas, and soybeans, are versatile and nutritious. They can be counted as part of the vegetable group or the protein group. Legumes are an excellent source of plant-based protein and fibre, making them a healthy alternative to animal-based proteins.
Low-fat dairy products are recommended as part of a healthy diet. Dairy provides essential nutrients like calcium, potassium, and vitamin D, which are important for bone health and overall wellness. When choosing dairy, opt for low-fat or fat-free options, and limit intake to one to two servings per day.
While the specific recommendations for carbohydrate intake after cancer treatment may vary, a standard suggestion is to obtain 50-60% of total calories from carbohydrates. This equates to 250-300 grams of carbohydrates per day for a 2,000-calorie diet. However, some low-carbohydrate diets suggest less than 20% of total calories from carbohydrates, which is approximately 100 grams per day. It is always advisable to consult a healthcare professional before making significant dietary changes, especially during cancer treatment or recovery.
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Frequently asked questions
There is no one-size-fits-all diet for cancer patients, but a low-carbohydrate diet is often recommended. This is because eating too many carbohydrates can lead to weight gain, obesity, and an increased risk for certain types of cancers. A low-carb diet can also help lower blood sugar and blood pressure.
The number of carbohydrates you should eat per day depends on your age, sex, body composition, activity levels, and health. The ketogenic diet, for example, recommends less than 10% of total calories from carbs, which is less than 50 grams for most people. The Paleo Diet recommends 20% of total calories from carbohydrates, which is 100 grams per day. The Atkins Diet allows 40-60 grams of carbohydrates per day.
A low-carb diet typically includes vegetables, fruits, legumes, and whole grains. It is recommended to choose low-fat dairy products and lean proteins such as poultry, fish, and nuts.
In addition to helping with weight loss, a low-carb diet can help lower blood sugar, which is important for people with diabetes. It can also help lower blood pressure and reduce the risk of cancer.
