What Every Woman Should Know About Reducing Risk, Improving Cellular Health, and Creating a Healthier Internal Environment
Breast cancer is personal to me.
I’m a clinical nutritionist, researcher, best-selling author, and someone who has spent more than 30 years studying nutrition, metabolism, weight loss, and human health.
But none of those titles explains why this subject matters so deeply to me.
I’m a mama’s boy.
My mother has survived breast cancer three times.
I will never forget the day she called to tell me that her cancer had returned for the third time. I had just landed in San Antonio, Texas, to attend the San Antonio Breast Cancer Symposium, one of the world’s major scientific meetings devoted to breast cancer.
The timing stopped me in my tracks.
Here I was traveling to learn more about breast cancer while my own mother was telling me that she was facing it again.
That experience changed the way I looked at this disease.
It also caused me to ask a question that I believe more of us should be asking:
What can we do before cancer is discovered?
Early detection matters. Mammography matters. Knowing your family history matters. Following the screening recommendations appropriate for your age and individual risk matters.
But detection and prevention are not the same thing.
A mammogram is designed to find breast cancer that may already be present.
I want women to understand something else:
What can we do to influence the environment in which our cells live before disease is detected?
We cannot prevent every breast cancer. Genetics, aging, reproductive history, breast density, environmental exposures, random cellular mutations, and many other factors can influence risk.
Cancer is fundamentally a disease involving genetic changes that alter how cells grow and divide [1].
But genes don’t operate in isolation.
Cells exist within an environment.
And that environment is influenced by metabolism, hormones, body composition, physical activity, alcohol, nutrition, immune function, inflammation, and the fats that become incorporated into our tissues and cell membranes.
That is where this conversation gets very interesting.
Breast Cancer Is More Than a Lump
When most people think about breast cancer, they picture a tumor.
But cancer biology begins long before someone can feel a lump.
Cancer develops when genetic changes disrupt the normal controls governing cell growth, division, repair, and death [1].
However, a tumor doesn’t exist by itself.
Cancer cells interact constantly with their surroundings.
That surrounding environment can include immune cells, blood vessels, connective tissue, signaling molecules, nutrients, hormones, inflammatory mediators, and other cells.
Scientists refer to this as the tumor microenvironment [2].
Think of a seed growing in soil.
The seed matters.
But so does the soil.
That analogy isn’t perfect—cancer is extraordinarily complex—but it illustrates an important principle:
The behavior of an abnormal cell can be influenced by the environment surrounding it.
This doesn’t mean that eating one food causes cancer or that changing your diet guarantees cancer prevention.
It means biology is interconnected.
And understanding that gives us more opportunities to influence our health.
Understanding the Tumor Microenvironment
The National Cancer Institute describes a microenvironment as the cells, molecules, and structures surrounding and supporting cells and tissues. Changes in this environment can influence how cancer cells grow and spread [2].
This is one of the most important developments in modern cancer biology.
Researchers no longer study only the cancer cell.
They study what surrounds it.
That includes immune cells, inflammatory molecules, blood vessels, fibroblasts, extracellular matrix, oxygen availability, hormones, nutrients, metabolic signals, and communication between cells.
This helps us understand why chronic inflammation deserves attention.
Inflammation doesn’t mean someone caused her breast cancer because she ate the wrong foods.
That is far too simplistic.
But chronic inflammatory signaling can become part of an environment that supports several biological processes involved in cancer development and progression [3,4].
The Inflammation Connection
Inflammation isn’t inherently bad.
You need it.
Cut your finger and inflammation helps initiate healing.
Develop an infection and inflammatory signaling helps your immune system respond.
The problem is when inflammation doesn’t appropriately resolve.
Acute inflammation is part of healing. Chronic inflammation is different.
Long-term inflammatory signaling can contribute to oxidative stress, DNA damage, altered immune responses, angiogenesis, cellular proliferation, and changes within the tissue environment [3,4].
Angiogenesis is particularly interesting.
A growing tumor needs nutrients and oxygen.
One way tumors support continued growth is by stimulating the development of new blood vessels.
Inflammatory pathways can participate in this process.
This is why I want people to stop thinking about inflammation only as sore joints, swelling, or something you “feel.”
Low-grade chronic inflammation can occur without obvious symptoms.
And nutrition is one of several factors that can influence inflammatory biology.
But before discussing food, we need to talk about metabolism.
Obesity, Insulin, and Metabolic Health
Body fat isn’t simply stored energy.
Adipose tissue is biologically active.
It produces hormones, cytokines, and other signaling molecules.
This becomes particularly relevant after menopause because adipose tissue contributes to estrogen production. Excess body fat is an established risk factor for postmenopausal breast cancer [5].
Metabolic health also matters.
Insulin resistance can result in higher circulating insulin concentrations. Insulin and insulin-like growth factor signaling interact with pathways involved in cellular growth and proliferation.
This is one reason I encourage people to look beyond glucose alone.
Someone can have a fasting glucose or hemoglobin A1C that hasn’t yet reached the diabetic range while the body is compensating by producing substantially more insulin.
That is why, in my work, I often encourage people to discuss fasting insulin with their healthcare provider in addition to glucose and A1C.
I want to know what the body is doing to maintain that glucose level.
Maintaining metabolic health, staying physically active, and avoiding excess body fat—particularly after menopause—are among the lifestyle strategies consistently emphasized by major cancer organizations for reducing breast-cancer risk [5,6].
And then we come to another part of the story that receives far less attention.
Fatty acids.
Nutrition Doesn’t Just Protect the Cell – It Helps Build the Cell
Every cell in your body is surrounded by a membrane.
Don’t picture a plastic bag wrapped around a cell.
The cell membrane is active.
It contains proteins and receptors. It helps regulate what enters and leaves the cell. And it participates in communication and signaling.
Fats are structural components of that membrane.
Think about what that means.
Some of the fats we consume can eventually contribute to the physical composition of our cells.
Two families of fats that are particularly important are omega-6 and omega-3 polyunsaturated fatty acids.
Both are essential.
We need them.
This isn’t a story about omega-6 being poison and omega-3 being magic.
Biology doesn’t work that way.
It is a story about balance, composition, metabolism, and function.
Omega-6 and Omega-3: Understanding the Difference
Linoleic acid (LA) is an essential omega-6 fatty acid.
Alpha-linolenic acid (ALA) is an essential omega-3 fatty acid.
The body can metabolize these fatty-acid families into longer-chain fatty acids and numerous biologically active compounds.
Among the fatty acids I pay particular attention to are arachidonic acid (AA), an omega-6 fatty acid; eicosapentaenoic acid (EPA), an omega-3 fatty acid; and docosahexaenoic acid (DHA), another long-chain omega-3 fatty acid.
EPA and DHA are found primarily in seafood and marine sources.
These fatty acids aren’t merely calories.
They can become incorporated into cell-membrane phospholipids and serve as precursors to signaling molecules.
Historically, omega-6-derived mediators have often been described as “pro-inflammatory” and omega-3-derived mediators as “anti-inflammatory.”
That explanation is useful for teaching, but the actual biology is considerably more complicated.
Different omega-6 and omega-3 fatty acids can produce multiple signaling molecules with different biological effects. Linoleic acid itself should not automatically be labeled inflammatory; controlled feeding research has not consistently shown that simply increasing dietary linoleic acid raises standard circulating inflammatory markers [7].
That distinction matters.
My concern isn’t that omega-6 is inherently bad.
My concern is imbalance and individual fatty-acid status.
What the Omega-6-to-Omega-3 Ratio Can Tell Us
Humans need both omega-6 and omega-3 fatty acids.
The question is whether our modern food environment has dramatically changed their relative availability.
Dr. Artemis Simopoulos has written extensively about the shift toward higher omega-6-to-omega-3 dietary patterns in Western societies and the potential implications for obesity and chronic disease [8,9].
But there is an important scientific debate here.
Some researchers argue that a single omega-6-to-omega-3 ratio can oversimplify fatty-acid biology because the ratio doesn’t tell us the absolute amount of each fatty acid. Two people can theoretically have the same ratio while having very different EPA, DHA, AA, and total fatty-acid concentrations [10].
I think that’s an important criticism.
It is also exactly why I don’t want to know only whether someone eats fish.
I want actual measurements.
When I review a red-blood-cell fatty-acid profile, I want to see the individual fatty acids as well as their relationships.
I want to know:
What is the omega-6-to-omega-3 balance?
What is the Omega-3 Index?
What are the EPA and DHA levels?
What does the AA-to-EPA relationship look like?
That is much more informative than asking:
“Do you take fish oil?”
Because taking an omega-3 supplement doesn’t tell me what actually became incorporated into your red blood cells.
Test. Don’t Guess.
A 2025 Discovery That Got My Attention
In 2025, researchers from Weill Cornell Medicine reported a potentially important connection between linoleic acid and triple-negative breast cancer (TNBC) [11].
Triple-negative breast cancer is called “triple negative” because the cancer cells lack three commonly targeted receptors: estrogen receptors, progesterone receptors, and excess human epidermal growth factor receptor 2 (HER2).
That makes TNBC biologically different from many other breast cancers.
The researchers reported that linoleic acid could bind to a protein called fatty acid-binding protein 5 (FABP5).
This interaction activated the mechanistic target of rapamycin complex 1 (mTORC1) pathway—a major cellular pathway involved in growth and metabolism.
In experimental models, this pathway promoted triple-negative breast-cancer growth [11].
That is fascinating.
But we need to understand what this research does—and does not—prove.
The study included laboratory and animal work. It does not establish that consuming seed oils causes breast cancer in women.
In fact, broader human research on linoleic acid and cancer has not produced a simple “more linoleic acid equals more breast cancer” conclusion.
What this study does tell us is something more nuanced and, in my opinion, more interesting:
Different breast-cancer subtypes may respond differently to specific nutrients and metabolic signals.
That brings us right back to the cellular environment.
Nutrition interacts with biology.
And individual biology matters.
What About Omega-3 and Breast Cancer?
Omega-3 fatty acids have also received considerable attention in breast-cancer research.
A large 2013 meta-analysis published in BMJ examined data from 21 independent prospective cohort studies. Researchers reported an inverse association between marine omega-3 polyunsaturated fatty-acid exposure and breast-cancer risk [12].
That doesn’t mean omega-3 prevents breast cancer.
Observational evidence cannot establish that conclusion.
But when we combine epidemiological findings with what we know about EPA and DHA biology—including their roles in cell membranes and inflammatory and pro-resolving signaling—it creates a compelling area for continued research.
This is another reason I believe fatty-acid status deserves more attention.
The question shouldn’t simply be:
“Do you eat salmon?”
The better question may eventually become:
“What is actually present in your cells?”
The DO-HEALTH Study: This Is Where Things Get Really Interesting
One of the studies I find especially interesting is the DO-HEALTH trial.
Researchers enrolled 2,157 generally healthy adults age 70 and older from five European countries [13].
Participants were randomized to different combinations of vitamin D3 at 2,000 IU per day, marine omega-3 fatty acids at 1 gram per day, a simple home strength-exercise program three times per week, or corresponding control interventions.
The omega-3 intervention provided approximately 330 mg EPA and 660 mg DHA daily.
Participants were followed for three years.
Researchers then examined the occurrence of verified invasive cancer.
When each intervention was examined individually, the estimated reductions in invasive-cancer risk did not reach statistical significance.
But something interesting happened when interventions were combined.
The strongest estimate occurred when participants received vitamin D + omega-3 + exercise together [13].
This study needs to be interpreted cautiously.
Only 81 invasive cancers occurred. Cancer was a secondary outcome. Participants were age 70 and older. The trial wasn’t designed specifically to prove prevention of breast cancer. And three years is relatively short in cancer biology.
So DO-HEALTH does not prove that taking vitamin D and omega-3 while exercising prevents breast cancer.
But I think the study raises a powerful question:
What if health is improved most effectively when we stop looking for one magic bullet?
Think about the three interventions.
Omega-3 influences membrane composition and signaling.
Vitamin D functions in numerous cellular pathways.
Exercise improves skeletal muscle, insulin sensitivity, metabolic health, and body composition.
Instead of asking:
“What’s the one supplement that prevents cancer?”
Maybe the better question is:
“How many aspects of my internal environment can I improve?”
That is much closer to the way I believe nutrition and preventive health should be approached.
Why I Believe Women Should Know Their Fatty-Acid Status
Let me make an important distinction.
Omega-6-to-omega-3 testing is not currently an established breast-cancer screening test, and major cancer organizations do not currently recommend it as a standard method for predicting breast-cancer risk.
A fatty-acid test cannot tell you whether you have breast cancer.
It cannot tell you that you will develop breast cancer.
It doesn’t replace mammography, genetic counseling, breast MRI when indicated, clinical evaluation, or any other recommended screening.
So why am I so interested in it?
Because it answers a completely different question.
It tells us about fatty-acid status.
And fatty acids participate in membrane structure, signaling, inflammatory pathways, and numerous aspects of human physiology.
In my opinion as a clinical nutritionist, that information is valuable.
We routinely measure cholesterol.
We measure glucose.
We measure A1C.
We measure blood pressure.
Some people measure vitamin D.
Yet most people have absolutely no idea what their long-chain omega-3 status looks like.
They don’t know their EPA.
They don’t know their DHA.
They don’t know their Omega-3 Index.
And they don’t know their omega-6-to-omega-3 balance.
I believe women interested in optimizing their nutritional and cellular health should have the opportunity to know those numbers.
Then, if the results are not where they want them to be, they can work with an appropriate healthcare or nutrition professional to improve them.
That’s very different from claiming the test diagnoses or prevents cancer.
Knowledge gives you something to act on.
The Diet Free Life 80/20 Approach
This brings us to food.
I have spent more than 30 years teaching people that healthy eating doesn’t require perfection.
In fact, perfection is one of the reasons diets fail.
People try to eat perfectly.
They eliminate everything they enjoy.
They white-knuckle their way through a restrictive plan.
Then life happens.
Eventually they eat something “off plan,” believe they failed, and abandon the entire program.
That’s not how I want people to live.
My Diet Free Life methodology uses an 80/20 approach.
Approximately 80% of the time, build your nutrition around foods that support health, metabolism, adequate protein, fiber, micronutrients, healthy fats, and overall diet quality.
Then allow flexibility approximately 20% of the time.
That doesn’t mean 20% of your diet should consist of junk food.
It means you don’t need nutritional perfection to live a healthy life.
A healthy dietary pattern can emphasize vegetables and fruits; beans and other fiber-rich foods; whole-food carbohydrate sources appropriate for the individual; adequate protein; fish and seafood, particularly sources of EPA and DHA; nuts and seeds; extra-virgin olive oil and other minimally processed foods—while limiting alcohol, heavily processed foods, excessive added sugars, and dietary patterns that promote chronic excess calorie intake.
Major cancer-prevention recommendations similarly emphasize the overall dietary pattern, rather than a single miracle food [5,6].
This is important.
Broccoli isn’t going to save you from an otherwise unhealthy lifestyle.
Salmon isn’t magic.
Blueberries aren’t chemotherapy.
And eating birthday cake doesn’t suddenly cause cancer.
The pattern matters.
That is the beauty of 80/20.
It gives people a way to apply nutritional science to the real world.
We Have to Talk About Alcohol
If we’re going to have an evidence-based conversation about breast-cancer risk, we have to talk about alcohol.
This is one area where the evidence is considerably stronger than many people realize.
Alcohol consumption is an established modifiable risk factor for breast cancer [5,6].
Alcohol can influence estrogen concentrations and can also generate acetaldehyde, a toxic metabolite capable of damaging DNA.
The relationship is dose-related: generally, greater alcohol exposure is associated with greater breast-cancer risk.
That can be uncomfortable information because wine has been marketed for decades as part of a healthy lifestyle.
But when we’re discussing cancer risk specifically, alcohol isn’t a health food.
For someone whose priority is reducing cancer risk as much as reasonably possible, less alcohol is better, and not drinking removes alcohol-related cancer risk.
That’s different from telling every person what she must do.
My job is to give people the information.
Then they can make an informed decision.
Exercise and Skeletal Muscle Matter
Remember DO-HEALTH?
One of its three interventions wasn’t a nutrient.
It was exercise.
That’s important.
Skeletal muscle is much more than something that helps us look toned.
Muscle is metabolically active tissue.
Regular physical activity improves insulin sensitivity, helps maintain healthy body composition, supports glucose regulation, preserves physical function, and influences numerous signaling pathways.
Physical activity is also consistently associated with lower breast-cancer risk [5,6].
This becomes increasingly important as women age.
After menopause, maintaining muscle and limiting excessive fat gain can positively influence metabolic health.
You don’t have to become a bodybuilder.
Walk.
Resistance train.
Use bands.
Lift weights appropriate for your ability.
Challenge your muscles consistently.
And if you are older or have medical limitations, work with your healthcare team to determine what is appropriate for you.
Muscle is part of preventive health.
Prevention Doesn’t Replace Detection
Whenever I discuss prevention, I don’t want anyone misunderstanding the message.
Improving your diet does not replace breast-cancer screening.
Improving your omega-3 status does not replace mammography.
Exercise doesn’t replace mammography.
Losing excess body fat doesn’t replace mammography.
And an omega-6-to-omega-3 test certainly doesn’t replace mammography.
Mammography can detect breast cancer before it becomes clinically obvious, and appropriate screening can reduce the risk of dying from breast cancer [14].
Screening recommendations vary according to age, risk, breast density, family history, genetic variants, and other factors.
Women should discuss their individual screening strategy with their healthcare providers.
I see prevention and detection as two different tools.
Prevention asks: What can I do to reduce modifiable risk?
Screening asks: If cancer develops, how can we identify it as early as possible?
We need both conversations.
What Can a Woman Start Doing Today?
After reading all of this, I don’t want you overwhelmed.
I want you empowered with practical information.
Know your breast-cancer risk. Understand your family history. Ask whether genetic counseling is appropriate. Know your breast density when that information is available. Discuss your personal screening schedule with your healthcare provider.
Work toward a healthy body composition. Especially after menopause, excess adiposity is associated with increased breast-cancer risk.
Move your body and maintain your muscle. Combine regular movement with resistance exercise appropriate for your age and ability.
Take alcohol seriously. If reducing cancer risk is the priority, reducing alcohol exposure is one of the clearest modifiable actions available.
Improve the quality of your diet—but use an eating pattern you can maintain. For my clients, that’s where the Diet Free Life 80/20 approach becomes so useful.
Make health-supportive foods your normal—not your punishment.
Know your metabolic numbers. Discuss glucose, hemoglobin A1C, lipids, blood pressure, and, when appropriate, fasting insulin and other metabolic markers with your healthcare provider.
And I would add one more:
Consider knowing your fatty-acid status.
Not because an omega-6-to-omega-3 test is a breast-cancer diagnostic test.
It isn’t.
I recommend it because I believe nutritional status should be measured whenever practical rather than assumed.
If you’re taking omega-3, why guess whether it’s changing your blood fatty-acid profile?
Measure it.
Test. Don’t Guess.
This has become one of the most important philosophies in my work:
Test. Don’t Guess.
People tell me all the time:
“I eat healthy.”
“I take fish oil.”
“I eat salmon.”
“My supplement has omega-3.”
Those statements don’t tell me what is present in their red blood cells.
Testing does.
A red-blood-cell fatty-acid test provides information about fatty-acid status that cannot be obtained simply by asking what someone ate yesterday.
That’s why I use the BalanceTest.
I want to see the numbers.
And after someone works to improve them over several months, I want to test again.
Did EPA increase?
Did DHA increase?
Did the Omega-3 Index improve?
Did the omega-6-to-omega-3 balance change?
Did the AA-to-EPA relationship improve?
Don’t assume.
Measure. Intervene. Retest.
At the same time, we need to keep this scientifically responsible.
We do not yet have randomized clinical trials showing that lowering an individual’s measured omega-6-to-omega-3 ratio prevents breast cancer.
That research needs to be done.
But we do know that omega-3 and omega-6 fatty acids participate in important biological pathways, that fatty-acid composition can be measured, and that EPA and DHA are incorporated into cell membranes.
For me, that’s enough reason to want to know my status.
Final Thoughts
If there is one thing I want every woman to take away from this article, it is this:
You are more than a mammogram.
Screening is critically important.
But health doesn’t begin on the day a tumor is detected.
It is being influenced every day.
By movement.
By alcohol exposure.
By body composition.
By metabolic health.
By dietary patterns.
By the nutrients available to your cells.
By your genetics.
By your environment.
And by factors science is still discovering.
No woman can control all of them.
And no woman who develops breast cancer should ever be made to believe that she somehow caused her disease because she didn’t eat perfectly, exercise enough, or take the right supplement.
Cancer is far more complicated than that.
But not being able to control everything does not mean we should ignore the things we can influence.
That’s where I want the conversation to change.
Don’t wait until you’re sick to become interested in your metabolism.
Don’t wait until you’re diagnosed with a disease to start thinking about skeletal muscle.
Don’t assume you’re getting enough omega-3 because there’s a fish-oil bottle in your cabinet.
Don’t assume your cellular fatty-acid profile is healthy because your cholesterol looks normal.
And don’t pursue nutritional perfection.
Build a lifestyle you can actually live.
Follow the 80/20 approach.
Move your body.
Protect your muscle.
Limit alcohol.
Maintain a healthy body composition.
Eat foods that nourish you.
Follow appropriate breast-cancer screening.
Know your risk factors.
And when there is something meaningful that can be measured:
Test. Don’t Guess.
My mother has survived breast cancer three times.
If what I’ve learned through her journey, my decades in nutrition, and the research presented here encourages even one woman to ask better questions and become more proactive about her health, writing this article was worth it.
Early detection can save lives.
But let’s also have a much bigger conversation about what we can do before detection is ever necessary.
If you would like to learn more about testing your omega-6-to-omega-3 balance and fatty-acid status, contact the person who shared this article with you or email me at robert@dietfreelife.com.
References
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- National Cancer Institute. (2026). What is cancer? National Institutes of Health.
- National Cancer Institute. (n.d.). Definition of microenvironment. NCI Dictionary of Cancer Terms.
- Coussens, L. M., & Werb, Z. (2002). Inflammation and cancer. Nature, 420(6917), 860–867.
- Mantovani, A., Allavena, P., Sica, A., & Balkwill, F. (2008). Cancer-related inflammation. Nature, 454(7203), 436–444.
- American Cancer Society. (2026). Breast cancer: Risk and prevention. American Cancer Society.
- World Cancer Research Fund/American Institute for Cancer Research. (2018). Diet, nutrition, physical activity and breast cancer. Continuous Update Project Expert Report.
- Johnson, G. H., & Fritsche, K. (2012). Effect of dietary linoleic acid on markers of inflammation in healthy persons: A systematic review of randomized controlled trials. Journal of the Academy of Nutrition and Dietetics, 112(7), 1029–1041.e15.
- Simopoulos, A. P. (2002). The importance of the ratio of omega-6/omega-3 essential fatty acids. Biomedicine & Pharmacotherapy, 56(8), 365–379.
- Simopoulos, A. P. (2016). An increase in the omega-6/omega-3 fatty acid ratio increases the risk for obesity. Nutrients, 8(3), 128.
- Harris, W. S. (2018). The omega-6 ratio: A critical appraisal and possible successor. Prostaglandins, Leukotrienes and Essential Fatty Acids, 132, 34–40.
- Li, X., et al. (2025). Linoleic acid-dependent activation of growth signaling in triple-negative breast cancer through fatty acid-binding protein 5. Nature Communications.
- Zheng, J. S., Hu, X. J., Zhao, Y. M., Yang, J., & Li, D. (2013). Intake of fish and marine n-3 polyunsaturated fatty acids and risk of breast cancer: Meta-analysis of data from 21 independent prospective cohort studies. BMJ, 346, f3706.
- Bischoff-Ferrari, H. A., et al. (2022). Combined vitamin D, omega-3 fatty acids, and a simple home strength exercise program may reduce cancer risk among active adults aged 70 and older: A randomized clinical trial. Frontiers in Aging, 3, 852643.
- National Cancer Institute. (2026). Breast cancer screening. National Institutes of Health.
________
Robert Ferguson is a California- and Florida-based single father of two daughters, clinical nutritionist, Omega Balancing Coach™, researcher, best-selling author, speaker, podcast and television host, health advisor, NAACP Image Award Nominee, creator of the Diet Free Life methodology, and Chief Nutrition Officer for iCoura Health. He also serves on the Presidential Task Force on Obesity for the National Medical Association and the Health and Product Advisory Board for Zinzino, Inc.
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