Brenda Khan
Research shows that a plant-based diet is the best diet for cancer prevention. This includes eating a variety of fruits, vegetables, whole grains, beans, nuts, seeds, and legumes. Plant-based diets are full of phytochemicals, which are natural compounds that can help prevent cancer. In addition to eating plant-based foods, it is important to limit red and processed meats, alcohol, and sugary drinks, as these can increase your risk of developing cancer. Maintaining a healthy body weight is also crucial, as excess body weight is linked to an increased risk of cancer.
| Characteristics | Values |
|---|---|
| Food type | Plants, vegetables, fruits, whole grains, beans, seeds, nuts, plant-based proteins, lean chicken, fish |
| Food to limit/avoid | Red meat, alcohol, processed foods, sugar-sweetened drinks, processed meats |
| Diet type | Balanced, healthy, plant-based, high-fibre, low-calorie |
| Other | Exercise, maintain a healthy weight |
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What You'll Learn
Eating more plant-based foods
Plant-based foods are full of chemical compounds called phytochemicals, which are natural compounds in plants that can help prevent chronic diseases like cancer. Phytochemicals protect the body from damage and interrupt processes in the body that encourage cancer production. Plant-based diets are also high in fibre, which has been shown to lower the risk of breast and colorectal cancer.
Research shows that a diet filled with a variety of vegetables, fruits, whole grains, beans, legumes, and other plant foods helps lower the risk for many cancers. In fact, one study showed that a combination of tomato and broccoli was more effective at slowing tumour growth than either food alone, demonstrating the power of nutrition when foods are teamed together.
Plant-based diets are also full of carotenoids, which are fat-soluble compounds that need to be accompanied by a fat source to be absorbed. Carotenoids are highly pigmented, so look for natural foods that are red, orange, yellow, and green. Examples of carotenoids include beta carotene, lycopene, and lutein. They have been linked to reducing the risk of heart disease, cancer, macular degeneration, and cataracts.
Plant-based diets can also include whole grains and legumes, which have been shown to decrease the risk of cancer and improve overall health. In addition, young women who ate the most fibre-rich diets were 25% less likely to get breast cancer later in life, and each 10 grams of daily fibre could lower the risk of colorectal cancer by 10%.
While no single food can magically reduce your risk of developing cancer, filling your plate with plant-based foods is a great step towards cancer prevention.
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Reducing alcohol consumption
Alcohol consumption is linked to an increased risk of developing cancer. Alcohol use accounts for about 5% of all cancers and 4% of all cancer-related deaths in the United States. The more alcohol one consumes, the higher the risk of cancer.
Alcohol use is associated with an increased risk of cancers of the mouth, throat, voice box, and oesophagus. When combined with smoking, this risk increases significantly. Alcohol can cause cells in the mouth and throat to absorb harmful chemicals, increasing the risk of cancer in these areas. It is also linked to an elevated risk of breast cancer, with even small amounts increasing the likelihood. This may be due to alcohol's ability to raise oestrogen levels in the body, which can lead to more frequent cell division and a higher chance of cancer development.
Long-term alcohol consumption is also associated with liver cancer. Regular, heavy drinking can lead to inflammation and scarring of the liver, increasing the risk of cancer in this organ. Additionally, alcohol consumption is linked to a higher risk of cancers in the colon and rectum, with stronger evidence found in men but also some links identified in women.
To reduce the risk of cancer, it is recommended to avoid alcohol consumption altogether. However, for those who choose to drink, it is important to be aware of the risks and aim to drink less frequently and in smaller quantities. The recommended limit is no more than two drinks per day for men and one drink per day for women, with women having a lower limit due to their smaller body size and slower breakdown of alcohol.
It is worth noting that the benefits of alcohol consumption for reducing the risk of certain cancers, such as kidney cancer and non-Hodgkin lymphoma, are likely outweighed by the harms associated with alcohol intake. Research suggests that the optimal number of drinks to minimise overall health risks is zero. Therefore, reducing alcohol consumption is an important step in lowering the risk of cancer and improving overall health.
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Limiting red and processed meats
Red meat and processed meat have been linked to an increased risk of cancer. The World Health Organization (WHO) has classified processed meat as a Group 1 carcinogen, meaning there is strong evidence that it causes cancer. Processed meats include bacon, ham, salami, and sausages. Red meat, such as beef, lamb, and pork, has been classified as a Group 2A carcinogen, indicating it probably causes cancer.
Research suggests that eating red and processed meat increases the risk of colorectal cancer. The chemicals found in these meats, added during processing or produced when cooking at high temperatures, can increase the risk of cancer. For example, when a chemical called haem in red meat is broken down in the gut, N-nitroso chemicals are formed, which can damage the cells that line the bowel and lead to bowel cancer. These same chemicals also form during the digestion of processed meat due to the nitrite and nitrate preservatives used. The risk of developing bowel cancer increases with the amount of meat consumed. It is estimated that eating more than 700 grams of red meat per week or 50 grams of processed meat per day significantly raises the risk.
To reduce the risk of cancer, it is recommended to limit or cut out red and processed meat. The government advises those who consume a lot of these meats to reduce their intake to 70 grams or less per day, which is approximately three slices of ham or two slices of bacon. Instead of red and processed meat, lean chicken, fish, or plant-based proteins can be chosen. Meat-free days, such as Meat-free Mondays, can be implemented, and new recipes incorporating chicken or fish instead of red and processed meat can be explored. Pulses, such as beans or lentils, can also be used as substitutes in meals.
While limiting red and processed meat can be beneficial, it is important to ensure adequate nutrient intake. For those following vegetarian or vegan diets, it is crucial to obtain sufficient protein, Vitamin B12, iron, zinc, calcium, and omega-3 fatty acids from alternative sources.
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Increasing fibre intake
Increasing your fibre intake is a great way to reduce your risk of developing cancer. Fibre is an essential part of a healthy diet, yet many people do not get enough of it. Fibre can help you maintain a healthy weight, which is one of the most important factors in reducing your risk of cancer. Young women who eat the most fibre-rich diets are 25% less likely to get breast cancer later in life, and each 10 grams of daily fibre can lower the risk of colorectal cancer by 10%.
There are two types of fibre: soluble and insoluble. Soluble fibre attracts water and turns to gel during digestion, slowing the digestive process and increasing stool bulk. Insoluble fibre helps food pass more quickly through the stomach and intestines, promoting the normal movement of intestinal contents. Both types of fibre are important for a healthy diet and can be found in a variety of whole foods.
To increase your fibre intake, try to include at least one serving of whole grains in every meal. This could be brown rice, whole wheat, buckwheat, or oatmeal. Look for breads with the highest amount of fibre per slice, and choose cereals with at least 5 grams of fibre per serving. Keep whole-wheat crackers on hand for a fibre-rich snack, and use whole-wheat flour when cooking or baking.
In addition to whole grains, there are many other fibre-rich foods that can be incorporated into your diet. Fruits, vegetables, legumes, and beans are all excellent sources of fibre. Aim to fill two-thirds of your plate with these plant-based foods at every meal. Remember to increase your water intake as you add more fibre to your diet, and be sure to increase your fibre intake gradually to avoid any abdominal pain or bloating.
By making these simple changes, you can increase your fibre intake and reduce your risk of cancer. A high-fibre diet has many health benefits and can be a delicious and nutritious way to improve your overall well-being.
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Maintaining a healthy weight
Firstly, it's important to focus on consuming fewer calories than you expend. Calories are units of energy from food and drink that fuel our bodies. On average, men need around 2,500 calories per day, while women require approximately 2,000 calories. However, individual needs may vary based on activity levels and personal goals. It's also crucial to remember that eating too much of any food can increase your body fat ratio, which, in turn, can elevate your cancer risk. Therefore, it's essential to practice portion control and be mindful of your calorie intake.
Adopting a healthy and balanced diet is key to maintaining a healthy weight. Aim to fill two-thirds of your plate with vegetables, fruits, whole grains, beans, seeds, nuts, and plant-based proteins. These plant-based foods are rich in phytochemicals, which are natural compounds that offer protection against cancer. Additionally, limit your intake of red meat, processed foods, and sugar-sweetened drinks, as these can increase your risk of cancer.
Physical activity is also an essential component of weight management. The American Heart Association recommends 150 to 300 minutes of physical activity per week to prevent weight gain and maintain a healthy weight. This can include activities such as walking, cycling, aerobics, or even heavy housework. Finding an activity you enjoy is crucial, as it will make exercising feel less like a chore.
Finally, it's important to note that fad diets and quick weight-loss schemes are often ineffective and challenging to maintain. Instead, focus on setting small, realistic goals and making gradual, sustainable changes. Surround yourself with a supportive network of friends, family, and health professionals who can help you stay motivated and accountable. Remember, maintaining a healthy weight is a long-term commitment, and every step towards a healthier lifestyle counts.
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Frequently asked questions
There is no single food that can prevent cancer. However, a plant-based diet with a variety of fruits, vegetables, whole grains, beans, nuts, seeds, and legumes is believed to lower the risk of many cancers.
Alcohol, red meat, and processed meat are linked to an increased risk of cancer. It is best to avoid or limit the consumption of these foods.
Phytochemicals found in plant-based foods have been shown to protect the body from damage and reduce inflammation, thus lowering the risk of cancer. Aim for a diet rich in phytochemicals, such as tomatoes, broccoli, and dark green and orange vegetables.
Yes, maintaining a healthy body weight and exercising regularly are important factors in reducing the risk of cancer. Excess body weight is linked to an increased risk of more than 10 different types of cancer. The American Cancer Society recommends adults engage in 150-300 minutes of moderate-intensity activity or 75-150 minutes of vigorous-intensity activity per week.
