Breast cancer prevention: change your biological terrain

Every October the message is the same: get your mammogram, know your risk, early detection saves lives. All of that is true, but it is incomplete, because it treats breast cancer like weather, something you can only catch early and never prevent. Elizabeth Boham, medical director at the Ultra Wellness Center, has spent two decades asking a different question. Her view comes from experience. She was diagnosed with triple negative breast cancer at 30, with no family history, while she exercised daily and ate well. That was 27 years ago. Her question changed how she practices: why did this body become a place where cancer could grow?

The terrain theory of health

In conventional medicine the focus is on the cancer cell, which matters. Functional medicine adds the soil around the cell. Cancer grows more easily when the terrain is disturbed, and several things shape that terrain:

• Inflammation, local or systemic, favors cancer growth
• High insulin and insulin resistance fuel the growth of cancer cells
• The microbiome influences estrogen metabolism and cancer risk
• The immune system has to find and clear abnormal cells
• Lifestyle, including stress, sleep, exercise and alcohol

Everyone has abnormal cells at any moment. Natural killer cells patrol the body and clear them, a bit like Navy Seals. How well they work depends heavily on nutritional status and on the toxins you are exposed to. Eating nutrient dense foods, getting fiber, sweating, drinking enough water and eating colorful plants all help your body remove toxins and keep immune surveillance working.

Why estrogen excess matters

Many breast cancers are fueled by estrogen. Several things can push you toward an absolute or relative excess:

• Body fat percentage. More body fat means more estrogen, in men and women. It is about body composition, not only pounds on the scale, so lean muscle mass matters.
• Xenoestrogens. These environmental toxins act like estrogen and bind to its receptors. They include BPA, parabens, phthalates, pesticides and herbicides.
• The gut. An imbalanced microbiome can make more of the enzyme beta glucuronidase, which lets estrogen be reabsorbed.
• Alcohol. It raises estrogen and is linked to several cancers.
• Cycle changes. Missed ovulation in the late 30s and 40s, or PCOS, leaves estrogen unopposed.

All of these are modifiable risk factors.

Hormone therapy without the fear

After the 2002 Women's Health Initiative, millions of women stopped hormone therapy, yet that study used horse estrogen and synthetic progesterone. Today the approach is more nuanced. Boham typically uses bioidentical estrogen through the skin, oral or transdermal progesterone, and local vaginal estrogen for dryness, then checks how each person metabolizes estrogen. Doses vary widely, from the lowest patch to much higher ones. Bioidentical hormones are not thought to cause cancer, but they can feed cancer cells that are already there, so screening and a good conversation with your provider matter.

Testing your terrain

You can measure much of this. Useful markers include:

• Fasting insulin, hemoglobin A1c and a cholesterol pattern for insulin resistance
• C reactive protein for inflammation
• Serum zinc and copper
• B vitamin status and homocysteine, which reflect methylation and how well you clear used estrogen
• Vitamin D
• Estrogen metabolism, microbiome patterns and genetics
• Urinary environmental chemicals, pesticides, glyphosate and heavy metals

Why more young women get cancer

Breast cancer under 40 is rising, as are colorectal cancers. Boham points to two drivers: the microbiome and toxins. Toxin exposure may have happened in the womb or even to your mother. Antibiotics in medicine and in the food supply also reshape the microbiome. Low butyrate, a postbiotic made by gut bacteria from fiber, is linked to higher breast cancer risk, and butyrate helps switch off cancer promoting genes.

Screening is not prevention

Screening is early detection. Current guidance is a mammogram every other year between 40 or 45 and 75, personalized to your risk. Dense breast tissue may call for an ultrasound, and high risk women may add MRI. Mammography works less well in younger women. Online risk calculators help you decide whether to start earlier, and you should get to know your breasts and report any lump, bump or dimpling.

What to do tomorrow

• Balance blood sugar. Include protein, healthy fat and fiber at every meal.
• Eat cruciferous vegetables. Broccoli, cabbage, kale and Brussels sprouts provide sulforaphane, which supports glutathione and estrogen metabolism.
• Add ground flaxseed for fiber and omega 3 fats.
• Aim for 8 to 12 servings of colorful plant foods daily.
• Move every day. Combine cardio and strength training.
• Manage stress and sleep. Add breathwork and rest.
• Limit alcohol to one or two drinks a week or fewer.
• Lower toxic exposure. Use the Environmental Working Group for skin care and cleaning products, filter water and air, and never heat food in plastic in the microwave.

Conclusion

You are not a sitting duck. Terrain is changeable, and the sooner you work on food, movement, stress, sleep, alcohol and toxins, the more you tilt the odds. Boham also offers a free download of 15 tips to lower breast cancer risk at drboham.com.