Leena Watts
A healthy diet and lifestyle can play a significant role in lowering the risk of cancer. While there is no single food that can prevent or cause cancer, a balanced diet containing fresh fruits, vegetables, and good fats is known to benefit overall health. Consuming certain foods can provide the body with the nutrients it needs to help reduce the risk of cancer. These include apples, berries, fatty fish, legumes, dark chocolate, garlic, and fermented foods. In addition, limiting alcohol consumption and maintaining a healthy weight are important factors in reducing the risk of cancer.
| Characteristics | Values |
|---|---|
| Alcohol | Alcohol is a toxin and drinking any amount can increase the risk for several cancers. |
| Whole grains | The ACS recommends choosing whole grains over processed carbohydrates. |
| Red meat | Reduce intake of red and processed meats. |
| Fruits and vegetables | Eat a variety of fruits and vegetables to increase vitamins, minerals, fiber, and other substances that may help prevent cancer. |
| Legumes | Rich in vitamins, minerals, protein, and fiber, legumes are recommended by the American Cancer Society as one of the most important food groups for cancer prevention. |
| Nuts and seeds | Eat more nuts and seeds. |
| Weight | Excess weight puts you at higher risk for many cancers. |
| Polyphenols | Plant-based compounds that may help prevent inflammation and infections. |
| Berries | Rich in vitamins, minerals, and fiber, berries may also modify the immune system to help delay cancer development. |
| Dark chocolate | A good source of polyphenols and flavanols, dark chocolate can deliver fiber, antioxidants, and minerals that may lower the risk of certain cancers. |
| Garlic | A root vegetable, garlic contains allicin, a protective sulfur compound that inhibits cancer progression. |
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What You'll Learn
Consume fruits, vegetables, nuts and seeds
Consuming fruits, vegetables, nuts, and seeds is an important part of a healthy diet and may help reduce the risk of cancer. While no single food can prevent cancer, a balanced diet that includes a variety of these foods can provide essential nutrients and antioxidants that may help lower the risk.
Fruits and vegetables are rich sources of vitamins, minerals, and antioxidants, which are beneficial for overall health and may offer some protection against cancer. The National Cancer Institute suggests that consuming more fruits and vegetables, which are high in antioxidants, may decrease the risk of certain types of cancer. Dark green and orange vegetables, cruciferous vegetables such as broccoli and cabbage, soy products, legumes, allium vegetables like onions and garlic, and tomato products are all worth including in your diet. Additionally, fruits and vegetables are typically low in calories and high in fiber, which can help maintain a healthy weight—a crucial factor in cancer prevention, as excess body weight is linked to an increased risk of cancer.
Nuts and seeds are nutrient-dense foods that offer a range of potential health benefits, including cancer prevention. They are good sources of healthy fats, fiber, and phytochemicals, which may have anticarcinogenic and anti-inflammatory properties. Walnuts, in particular, have been studied for their potential cancer-preventing properties. Research suggests that consuming walnuts may suppress the growth of breast cancer tumors and inhibit DNA damage and tumor growth in colon cancer. Other nuts and seeds, such as almonds, pistachios, and flaxseed, are also being investigated for their potential cancer-fighting properties.
It is important to note that while dietary choices are crucial, other lifestyle factors also play a significant role in cancer prevention. Maintaining a healthy weight, staying physically active, and limiting alcohol consumption are all important components of a holistic approach to reducing the risk of cancer. Consulting with a healthcare professional or a dietitian can provide personalized guidance on incorporating these foods into your diet and making any necessary dietary adjustments.
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Limit alcohol intake
Alcohol use is a significant preventable risk factor for cancer, with alcohol accounting for about 5-6% of all cancers and 4% of cancer deaths in the United States. The National Institute on Alcohol Abuse and Alcoholism defines a standard alcoholic drink as containing 14.0 grams (0.6 ounces) of pure alcohol, which is typically found in 12 ounces of beer, 5 ounces of wine, or 1.5 ounces of 80-proof distilled spirits (hard liquor).
The link between alcohol and cancer is attributed to ethanol, a chemical compound found in alcoholic drinks that is recognized as a carcinogen. When the body processes ethanol, it breaks it down into acetaldehyde, a chemical that not only damages DNA but also impairs the body's ability to repair this damage. This DNA damage can lead to uncontrolled cellular growth and the development of cancer. Additionally, alcohol may reduce folate absorption and facilitate the entry of potential carcinogens into cells.
The risk of cancer increases with the amount of alcohol consumed, and even small amounts can elevate the risk for certain types of cancer, such as breast cancer. Moderate to heavy alcohol consumption is associated with a higher risk of colorectal cancer. Individuals with a defective form of ALDH2, an enzyme involved in processing alcohol, are at an increased risk of alcohol-related esophageal, head, and neck cancers when consuming comparable amounts of alcohol to those with the fully active enzyme.
To reduce the risk of cancer, it is advisable to limit alcohol intake. The American Cancer Society recommends that women have no more than one drink per day and men limit themselves to no more than two drinks per day. These limits should not be interpreted as a license to binge drink on other days, as this can lead to health and social problems. The federal government's Dietary Guidelines for Americans 2020-2025 advise against starting to drink alcohol for those who do not currently drink.
By reducing alcohol consumption, individuals can not only lower their risk of developing cancer but also improve their overall health and well-being.
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Avoid red and processed meats
While no one food can prevent cancer, and human studies have yet to confirm that any food can cause it, evidence suggests that diets high in fruits and vegetables may lower the risk of certain cancers. Observational studies suggest a link between higher vitamin D levels and a lower risk of colorectal cancer, and possibly bladder cancer.
On the other hand, red and processed meats have been linked to an increased risk of cancer. The World Health Organization has classified processed meats, including ham, bacon, salami, and frankfurters, as Group 1 carcinogens, meaning they are known to cause cancer. Red meat, such as beef, lamb, and pork, has been classified as a Group 2A carcinogen, meaning it probably causes 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 in red meat called haem is broken down in the gut, it forms N-nitroso chemicals (NOCs) that can damage the cells that line the bowel, leading to bowel cancer. Similarly, when nitrates and nitrites, which are added to processed meats to keep them fresh for longer, are consumed, they can also become NOCs and cause the same damage.
To reduce the risk of cancer associated with red and processed meats, it is recommended to limit intake or cut down on consumption. The government recommends that those who eat a lot of these meats should reduce their intake to 70 grams or less per day. This is approximately three slices of ham, two slices of bacon, or one small beef burger.
Making small changes can help, such as having meat-free days, finding new recipes that use chicken or fish instead of red and processed meats, substituting meat with pulses like beans or lentils, or reducing portion sizes when consuming these meats.
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Eat whole grains and legumes
Eating whole grains and legumes can be a beneficial component of a cancer-preventative diet. Whole grains are rich in dietary fiber, which has been linked to a reduced risk of colorectal cancer. They also contain nutrients, such as vitamins and minerals, that may offer additional health benefits. Examples of whole grains include brown rice, farro, bulgur, sorghum, quinoa, amaranth, buckwheat, corn, millet, teff, and wild rice.
Legumes, such as beans, peas, and lentils, have also been associated with a reduced risk of certain cancers, particularly colorectal cancer. Some studies suggest that legumes may inhibit the development and growth of cancer cells and increase their self-destruction. Additionally, the high fiber content of legumes may contribute to their potential cancer-fighting properties.
The American Cancer Society (ACS) recommends consuming a balanced diet that includes whole grains and legumes as part of a cancer-preventative lifestyle. Maintaining a healthy weight, engaging in regular physical activity, and limiting alcohol consumption are also important factors in cancer prevention.
While the research on the cancer-preventative effects of whole grains and legumes is ongoing, incorporating these foods into your diet can offer a range of other health benefits as well. Whole grains and legumes are nutrient-dense, providing your body with essential vitamins, minerals, and fiber. They can also help with weight management, which is crucial in reducing the risk of cancer and other chronic diseases.
It is important to note that cancer prevention is a complex topic, and dietary choices are just one aspect of a comprehensive approach. Consulting with a healthcare professional or a registered dietitian can provide personalized guidance on incorporating whole grains and legumes into your diet in a way that aligns with your individual needs and preferences.
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Maintain a healthy weight
Maintaining a healthy weight is one of the most effective ways to lower your risk of cancer. Excess body weight increases the risk of developing cancer, and it is estimated that at least 18% of all cancers are related to excess body weight. Globally, around 2 billion adults are overweight, with 800 million of those being obese. Obesity rates are rising in most countries, and this is a crucial factor in increasing the population's risk of cancer.
There are several ways to achieve and maintain a healthy weight. Firstly, it is important to be mindful of your diet. A diet rich in vegetables, fruits, whole grains, beans, and protein-rich foods is recommended. These foods are high in fibre and other essential nutrients, and they can help with weight loss and weight management by making you feel fuller for longer. It is also beneficial to limit your consumption of sugar-sweetened beverages and fast food, as these are major contributors to weight gain. Alcohol consumption should also be limited, as it is a preventable risk factor for cancer.
In addition to a healthy diet, regular physical activity is crucial for maintaining a healthy weight. The American Cancer Society recommends that adults engage in 150-300 minutes of moderate-intensity exercise or 75-150 minutes of vigorous-intensity activity each week. This can include a combination of aerobic and strength-building exercises. It is important to note that weight management is a gradual process, and it may take time to see results. It is recommended to make slow and steady changes to your diet and lifestyle, so you are more likely to stick to them and form long-lasting habits.
Finally, it is important to consult with a healthcare professional, such as a dietitian, who can provide personalized advice and strategies for maintaining a healthy weight. They can guide you in making dietary adjustments and increasing your physical activity to ensure a healthy weight and lower your risk of cancer.
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