From eatingwell.com
Breast cancer risk may be shaped more by patterns than by isolated choices
KEY POINTS
- Lifestyle choices, including exercise and dietary habits, can influence breast cancer risk.
- Nutrition experts share realistic ways you can support your health and lower your risk.
- Following a balanced diet, exercising and reducing alcohol consumption are good places to start.
People often think about breast cancer risk in terms of genetics or family history, but lifestyle choices can also influence risk over time. Lifestyle patterns include factors such as alcohol consumption, physical activity and overall dietary habits. Screening and genetic guidance tailored to your personal risk can also play an important role.
That doesn’t mean you need to overhaul your life or follow every cancer-prevention claim that shows up online. The strongest advice is much more practical than that. To sort through what actually matters, we spoke with nutrition experts about the dietary and lifestyle habits that may influence breast cancer risk over time, along with realistic changes worth focusing on first.
Alcohol Consumption
Alcohol is one dietary factor linked to breast cancer risk. The American Cancer Society notes that drinking alcohol is linked with a higher risk of breast cancer. In fact, research suggests that even low levels of alcohol consumption may be linked to an increased risk.
“Alcohol is one of the few dietary factors that has a fairly consistent relationship with increased breast cancer risk,” says Kate Dwyer, M.S., RD, LD, IFNCP. “The good news is that this doesn’t have to be an all-or-nothing conversation. Less is better, but reducing your intake still has benefits.”
Alcohol may influence breast cancer risk in several ways, including by raising oestrogen levels and contributing to DNA damage through acetaldehyde, a compound formed when the body breaks down alcohol. This pathway is particularly important because oestrogen can contribute to the growth of some breast cancers.
The most useful change is not always quitting overnight. Samantha DeVito, M.S., RD, CDN, recommends thinking about “reduction rather than perfection.” That might mean setting alcohol-free weekdays, choosing a mocktail at dinner or saving drinks for occasions when you truly want one.
Ultra-Processed Food Intake
A packaged lunch or the occasional quick convenience snack is not likely to contribute to breast cancer risk. The bigger concern is the eating pattern that can develop when ultra-processed foods make up the majority of your everyday diet. Over time, meals built around refined carbohydrates, processed meats and low-fibre foods may leave less room for foods more consistently linked with cancer prevention, including vegetables, fruits, beans, lentils, whole grains, nuts and seeds.
“One thing that often flies under the radar is regularly relying on ultra-processed foods, especially those high in refined carbohydrates and processed or red meats,” says Dwyer. “I’m not saying you can never eat these foods, but when a protein shake and a beef stick become the default for lunch, it can impact health over time,” she explains.
While still emerging, research on ultra-processed foods and breast cancer suggests that higher ultra-processed food intake is associated with higher breast cancer risk. The connection may not come down to one ingredient. Rather, ultra-processed foods can make it easier to eat fewer fibre-rich plant foods and more refined grains, added sugars and processed meats, all of which can affect overall diet quality.
A realistic place to start is with addition, not restriction, explains Alexa Larangeira, M.S., RDN, LD, CDNA. For example, try adding white beans to soup, lentils to tacos, berries to breakfast, a salad to pizza or roasted vegetables to a burger. Larangeira calls this “nutrition by addition.” As she puts it, “Focus on what you can add to your plate, like some dark leafy greens or some roasted carrots.”
Physical Inactivity
Movement may lower breast cancer risk in ways that have nothing to do with weight loss. Regular physical activity may help lower breast cancer risk by influencing oestrogen levels, insulin sensitivity and inflammation, three physiological pathways involved in how some breast cancers develop.
“Exercise reduces breast cancer risk largely through its effects on hormones and inflammation,” says nutritionist Jess Baker, M.S. “It lowers circulating oestrogen, improves insulin sensitivity and reduces inflammatory markers that can drive cancer cell growth. You don’t have to lose any weight for these benefits to kick in either,” she explains.
The American Cancer Society recommends adults get 150 to 300 minutes of moderate-intensity activity each week or 75 to 150 minutes of vigorous-intensity activity. For most people, that can look like brisk walking, cycling, swimming, dancing, gardening or strength training spread across the week.
“Consistent movement matters more than perfect workouts,” says Dwyer. If you are starting from very little activity, a 10-minute walk after lunch or dinner can be a realistic starting point. Over time, those small bouts can become a regular behaviour, which is more useful than an unrealistic plan you may abandon after two weeks.
Other Tips to Reduce Breast Cancer Risk
Lifestyle habits are only one part of breast cancer prevention. Age, family history, breast density and personal health history can also shape what screenings or preventive steps make sense for you.
These factors can help guide a more informed conversation with your health care provider.
- Know your family history beyond breast cancer. Tell your health care provider if close relatives have had breast, ovarian, pancreatic or prostate cancer, especially at younger ages. This can help determine whether genetic counselling or earlier screening may be appropriate.
- Ask whether your breast density changes your screening plan. Dense breast tissue can make mammograms harder to read and is also associated with a higher risk of breast cancer. If you have dense breasts, ask whether additional screening may be appropriate based on your overall risk.
- Keep up with routine mammograms. Screening does not prevent breast cancer, but it can help detect it earlier. Ask your provider when you should start screening and how often it should be done based on your age, health history and personal risk factors.
- Review hormone therapy with your clinician. If you use or are considering menopausal hormone therapy, ask about the benefits, risks, dose and length of use. Some forms of hormone therapy have been linked with higher risk of breast cancer, so this decision should be individualized.
Our Expert Take
The most useful way to think about breast cancer prevention is through patterns, not isolated choices. A single convenience meal or skipped workout is likely not what contributes to your risk. The bigger question is what your routine looks like most of the time. Focus on the changes with the clearest evidence and the lowest barrier to starting. Consume less alcohol when you can, add more fibre-rich foods to meals you already eat, build in movement that is sustainable and keep up with screenings that fit your personal risk. Breast cancer prevention is not about doing everything perfectly, but rather choosing habits and medical care you can realistically maintain.
https://www.eatingwell.com/things-that-impact-breast-cancer-risk-11996156
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