Adopting healthier lifestyle choices could prevent many cancer cases, according to health experts. Oncologists highlight that daily habits such as smoking, poor diet, lack of physical activity, alcohol consumption, inadequate sleep, and prolonged sitting contribute significantly to long-term cancer risk. Tobacco remains the leading preventable cause of cancer worldwide, with smoking not only linked to lung cancer but also to cancers of the mouth, throat, bladder, kidney, pancreas, and oesophagus. Even passive smoking increases lung cancer risk in non-smokers. Fortunately, quitting smoking can quickly lower cancer risk, with noticeable benefits manifesting within a few years.
Obesity is another significant risk factor, associated with a range of cancers including breast, colon, kidney, endometrial, and oesophageal. Excess body fat can lead to inflammation and hormonal changes that may foster tumour growth. Regular physical activity, recommended at a minimum of 150 minutes per week, such as brisk walking or cycling, can help mitigate cancer risk by reducing inflammation, balancing hormones, and supporting metabolic health. Doctors caution against prolonged sitting, which may elevate the risk of colorectal and endometrial cancers, even for those who exercise regularly.
Diet also plays a crucial role in cancer prevention. Experts advise limiting the intake of processed meats like sausages, bacon, and deli meats, known to increase colorectal cancer risk. High red meat consumption is similarly linked to higher bowel cancer risk. Conversely, diets rich in fiber, vegetables, fruits, healthy fats, and whole foods may help reduce cancer risk, with cruciferous vegetables like broccoli, kale, and cabbage offering compounds that bolster the body’s natural defenses.
Alcohol consumption is another key factor, as even moderate drinking can elevate the risk of breast, liver, and colorectal cancers. Additionally, experts point to lesser-known risk factors such as excessive sun exposure, tanning beds, poor sleep, disrupted sleep cycles, long-term night-shift work, and exposure to harmful environmental substances like radon gas.
Health professionals stress that preventing cancer doesn’t require dramatic lifestyle changes overnight. Instead, they recommend small, consistent improvements—such as quitting smoking, reducing processed food and alcohol intake, staying active, protecting skin from excessive sun exposure, and ensuring adequate sleep—to significantly decrease long-term cancer risk. Regular health screenings and medical check-ups are also essential for early detection and prevention.