Cancer remains one of the major health challenges facing communities, and while genetics and environmental factors play a role, what we eat can also influence our long-term health.
As a nutritionist, I believe we need to pay closer attention to our dietary choices. Increasing evidence shows that some foods and eating patterns are associated with a higher risk of certain cancers.
This does not mean that eating a particular food will automatically cause cancer, but frequent consumption of some foods may increase an individual’s risk over time.
Processed and red meats
Processed meats such as bacon, ham, sausages and hot dogs deserve particular attention. The International Agency for Research on Cancer classifies processed meat as carcinogenic to humans, based on sufficient evidence linking its consumption to colorectal cancer.
Some processed meats contain nitrates and nitrites, which can contribute to the formation of potentially harmful compounds in the body. Cooking meat at very high temperatures, such as grilling or pan-frying, can also produce compounds that may damage cells.
This does not mean people must completely eliminate meat from their diets. Rather, moderation, healthier cooking methods and greater consumption of plant-based foods should be encouraged.
The growing problem of ultra-processed foods
Walk into almost any shop and you will find soft drinks, packaged snacks, instant meals and other ultra-processed foods. They are convenient, affordable and often highly appealing, but frequent consumption may come at a cost.
Many ultra-processed foods contain high amounts of added sugar, unhealthy fats and salt while providing relatively little nutritional value. Regular consumption has been associated with obesity and metabolic problems, which are themselves linked to an increased risk of several cancers.
For families, especially children, replacing some packaged snacks and sugary drinks with fruits, vegetables, nuts and other minimally processed foods can be a simple but important step towards healthier eating.
Too much sugar and fat
A diet consistently high in added sugars and unhealthy fats can contribute to overweight, obesity and insulin resistance. These conditions can alter hormone levels and promote chronic inflammation, creating an environment that may favour the development of some cancers.
The issue, therefore, is not simply that “sugar feeds cancer”, as is sometimes claimed. Cancer is a complex disease, and there is no single food responsible for causing it. The greater concern is the long-term effect of excessive consumption of calorie-dense, nutrient-poor foods and the resulting metabolic problems.
Beware of contaminated food
Food safety is another important part of cancer prevention.
Aflatoxins, toxins produced by certain fungi, can contaminate improperly stored grains, nuts and other foods. Long-term exposure to high levels of aflatoxins is associated with liver cancer.
This is particularly relevant in communities where food may be stored under conditions that encourage mould growth. Proper drying and storage of grains and nuts, together with avoiding visibly mouldy food, can help reduce exposure.
Alcohol is also a risk
Although alcohol is not technically a food, it is commonly consumed with meals and deserves attention.
Alcohol is converted in the body into acetaldehyde, a substance that can damage DNA. Alcohol consumption has been associated with cancers of the mouth, throat, liver, breast and colon, among others.
The risk generally increases with the amount consumed. Reducing alcohol intake, or avoiding it altogether, can therefore contribute to lowering cancer risk.
Prevention starts on the plate
There is no single “cancer-causing food”, just as there is no diet that can guarantee someone will never develop cancer. Cancer has many causes, including genetics, infections, environmental exposures, lifestyle and chance.
However, our everyday food choices remain one area where we have considerable control.
A healthy diet should emphasise fruits and vegetables, whole grains, legumes, nuts, lean sources of protein and healthy fats, while limiting processed meats, ultra-processed foods, sugary drinks and excessive alcohol.
The message is not to live in fear of food. It is to eat wisely.
If we make healthier choices consistently—not just when we are sick—we can improve our overall health and potentially reduce some of the factors associated with cancer.
The Writer, Kamara Daniel is a nutritionist at Bwindi Community Hospital in Kanungu District.
