Cancer Prevention 2026: Diet, Lifestyle, and Evidence-Based Supplementation

Medically Reviewed | OneDayMD Editorial Team | Last updated: August 2026 · Consolidated and updated from two prior Cancer Advisor guides

Quick Answer

The strongest and most consistent evidence supports a few core cancer-prevention strategies: do not use tobacco in any form; limit or avoid alcohol (a January 2025 U.S. Surgeon General advisory concluded that alcohol causes at least seven types of cancer); maintain a healthy weight through a balanced diet and regular physical activity; and follow a plant-forward, high-fiber, Mediterranean-style eating pattern while minimizing ultra-processed foods and excess added sugar.

An estimated 40–50% of cancer cases may be attributable to potentially modifiable risk factors, although the exact proportion varies by population, cancer type, and methodology.

Certain supplements—including vitamin D, curcumin, and omega-3 fatty acids—have shown promising findings in specific settings, but the evidence is considerably less consistent than for established lifestyle measures. They should therefore be viewed as secondary or adjunctive strategies, not substitutes for a healthy diet, physical activity, tobacco avoidance and alcohol reduction.

In This Guide

Introduction: Why Prevention Deserves More Attention
Methodology: How We Weigh the Evidence
What Causes Cancer? The Hallmarks and the Modifiable Piece
Diet and Cancer Prevention
Lifestyle and Cancer Prevention
Best Anti-Cancer Supplements: What the Evidence Says
Other Important Recommendations
Evidence Summary Table (CEBM-Graded)
Key Takeaways: Your Prevention Blueprint
Frequently Asked Questions
AI Personalization Guide

Introduction: Why Prevention Deserves More Attention

Val Kilmer, Chadwick Boseman, Steve Jobs — all lost to cancer, all names that make you wonder what could have been done differently. The internet is overflowing with conflicting advice on that question: eat this, avoid that, take this "magic" pill. Even your own doctor, brilliant as they may be at treating disease, often doesn't have the time to dive deep into diet and lifestyle for prevention specifically. That gap is what this guide is built to close.

The scale of the problem is sobering. Updated GLOBOCAN estimates published in 2026 put global cancer cases at 20.6 million and cancer deaths at 9.8 million for 2024 alone — roughly 1 in 5 people will develop cancer in their lifetime. Yet despite trillions of dollars in cumulative global research funding, treatment advances have historically delivered incremental gains: Ladanie et al. (JAMA Network Open, 2020) found new cancer therapies added an average of 2.4 months of overall survival across the prior fifteen years, while Del Paggio et al. (JAMA Oncology, 2021) found a 3.4-month improvement over thirty years. Prevention, by contrast, is where the leverage really is: IARC's own analysis of the 2024 GLOBOCAN data concludes that nearly half of all cancer deaths are attributable to modifiable risk factors — tobacco, alcohol, excess body weight, physical inactivity, and diet chief among them.

American Institute for Cancer Research

So why doesn't prevention get more airtime? Partly because there's more commercial incentive in treating illness than preventing it, and partly because the most effective strategies — quitting smoking, eating more fiber, walking daily — aren't patentable and don't come in a dramatic package. This guide sifts through the research so you don't have to, focusing on the top of the evidence pyramid: large human trials, systematic reviews, and meta-analyses rather than hype.

Methodology: How We Weigh the Evidence

Not all scientific evidence carries equal weight. At the base of the pyramid sit lab studies on cells and animal models — useful starting points, but they don't always translate to humans. Moving up, you find small human trials, then larger studies. At the very top:

Umbrella reviews — reviews of other high-quality systematic reviews, giving the broadest, strongest overview.
Systematic reviews and meta-analyses — a systematic review collects and critically appraises all available evidence on a specific question; a meta-analysis statistically pools results across independent studies to generate an overall estimate.
Randomized controlled trials (RCTs) — the gold standard for testing whether an intervention causes an effect.
Large, long-term prospective human cohort studies — following many people over years to capture long-term associations.

Case reports and small preliminary trials sit lower on this hierarchy and are treated as hypothesis-generating rather than conclusive throughout this guide. Where a claim rests on weaker evidence, we say so explicitly.

What Causes Cancer? The Hallmarks and the Modifiable Piece

Cancer occurs when cells begin growing uncontrollably and fail to die when they should, eventually invading surrounding tissue. Researchers describe this process through a set of acquired abilities known as the "hallmarks of cancer" (Cancer Discovery, 2022):

Sustaining proliferative signaling
Evading growth suppressors
Resisting cell death
Enabling replicative immortality
Inducing angiogenesis
Activating invasion and metastasis
Deregulating cellular energetics
Avoiding immune destruction
Genome instability and mutation
Tumor-promoting inflammation
Unlocking phenotypic plasticity
Non-mutational epigenetic reprogramming
Polymorphic microbiomes
Senescent cells

The encouraging part: many of the diet and lifestyle strategies below directly counteract several of these hallmarks at once — reducing chronic inflammation, improving metabolic regulation, and supporting immune surveillance.

Diet and Cancer Prevention: Fueling Your Body's Defense

1. ACS 2020 Dietary Recommendations

The American Cancer Society emphasizes a healthy eating pattern at all ages: plenty of nutrient-rich foods, a variety of vegetables (especially dark green, red, orange, and fiber-rich legumes), whole fruits, and whole grains — while limiting red and processed meats, sugar-sweetened beverages, and highly processed refined-grain products.

2. 2024 International Guideline Update

Mediterranean diet — rich in fruits, vegetables, whole grains, legumes, nuts, and olive oil — is linked to reduced cancer risk.
Mindful eating, including overnight fasting windows, may play a modest role; extreme fasting is not recommended.
Plant-based and pescatarian diets are associated with lower overall and colorectal cancer risk versus meat-heavy diets.
Heme iron (red meat) is linked to higher lung cancer risk, while phytoestrogens may be modestly protective.
Coffee and tea appear roughly neutral for overall cancer risk.

Sources: AACR Cancer Progress Report 2024 · Nutrients 2024

3. Ultra-Processed Foods and Sugar: A Growing Body of Evidence (2026 Update)

This is the section where the evidence has moved fastest since our last update. A 2024 umbrella review — the highest tier of evidence — linked higher ultra-processed food (UPF) intake to 32 adverse health outcomes, including several cancers, across a pooled sample approaching 10 million participants. Since then:

A January 2026 JAMA Oncology prospective study of U.S. women found higher UPF intake associated with an increased risk of early-onset colorectal cancer precursors (adenomas), adding to concern about rising colorectal cancer rates in adults under 50.
The Moli-sani cohort study (published via AACR, 2026), following over 24,000 Italian adults, found that among cancer survivors, higher UPF consumption was linked to increased risk of death — plausibly through UPFs' effects on gut microbiota, inflammation, and metabolic disruption, independent of calorie content.
Multiple 2025–2026 cohort studies specifically link higher UPF intake to increased breast cancer incidence and mortality, including in medically underserved populations.
A dedicated interventional trial (U-TRANS, Gustave Roussy, recruiting through 2026–2028) is now testing whether actively reducing UPF intake improves diet quality in people at high cancer risk — a sign the field is moving from association toward intervention testing.

Separately, sugar-sweetened beverages remain linked to obesity-related cancers, and cancer cells are known to consume glucose at markedly higher rates than normal cells (the Warburg effect). None of this proves UPFs directly cause cancer — confounding by overall diet quality is a real limitation — but the direction and consistency of the signal across independent cohorts is now hard to dismiss.

Sources: BMJ 2024 umbrella review · JAMA Oncology 2026 · AACR / Moli-sani Study 2026 · ACS Guidelines (2020)

4. The Power of Plant-Based and Mediterranean Diets

A large 2024 review of reviews found vegetarian and vegan diets significantly reduce risk of heart disease, gastrointestinal cancer, prostate cancer, and related deaths.
Vegetarians and vegans should watch for lower intake of vitamin B12, K2, D, omega-3s, iodine, selenium, iron, and zinc — supplementation is often warranted.
A 2022 JAMA Oncology review supports plant-enriched diets for reducing cancer risk; men eating the most healthy plant-based foods had a 22% lower risk of bowel cancer in one large study.
Cruciferous vegetables (broccoli, cauliflower, kale) show potential benefit against several cancer types.
Mediterranean diets rich in extra-virgin olive oil and nuts may reduce breast cancer risk; a 2022 analysis linked daily olive oil consumption to a 31% lower risk of any cancer.

Sources: PLOS ONE umbrella review 2024 · JAMA Oncology 2022 · BMC Medicine 2022

5. The Importance of Dietary Fiber

A 2023 review of over 100 studies found high fiber intake associated with lower risk of esophageal, stomach, colon, rectal, breast, and other cancers, with 25–29 grams per day linked to the greatest reduction across several health outcomes.

Sources: American Journal of Clinical Nutrition 2023 · Lancet 2019

6. Fasting, Low-Carb, and Keto Diets: Still Controversial

Extreme calorie restriction or very intense exercise can raise cortisol and stress the body — best avoided as a prevention strategy.
Not recommended if you're underweight; may be considered short-term if overweight, though long-term safety data remain limited.
One Japanese cohort linked low-carbohydrate diets to higher colorectal and lung cancer risk but lower stomach cancer risk — a genuinely mixed signal.
Don't confuse limiting sugar/processed food (well-established benefit) with strict calorie restriction (far less established).
Preclinical research suggests ketogenic diets may create metabolic conditions unfavorable to some tumors — an active but unresolved research area.

Sources: Curr Issues Mol Biol 2021 · Nature 2019

7. Coffee and Cancer: More Good News Than Bad

A review of over 2,500 studies links coffee consumption to lower risk of liver cancer and basal cell carcinoma, along with better outcomes in non-metastatic colorectal cancer patients. Findings are strongest in Japanese cohort data for liver cancer specifically.

Sources: Nature 2021 umbrella review · JAMA Oncology 2020

Lifestyle and Cancer Prevention: Habits That Matter

1. Avoid Tobacco in All Forms

Smoking remains the single leading preventable cause of cancer, responsible for nearly 20% of all cancer cases and almost 30% of cancer deaths — including lung, mouth, throat, larynx, pancreatic, bladder, cervical, and kidney cancers. Secondhand smoke and chewing tobacco carry real risk too. Quitting is the single most powerful step available; talk to your doctor about cessation support.

Source: CA: A Cancer Journal for Clinicians 2024

2. Maintain a Healthy Weight and Be Physically Active

A healthy weight lowers risk of breast, prostate, lung, colon, and kidney cancers.
Physical activity alone reduces breast and colon cancer risk. Aim for 150 minutes of moderate aerobic activity (or 75 minutes vigorous) weekly, plus 30–60 minutes of strength training weekly — more than 60 minutes of strength training didn't add further benefit in reviewed studies, and very high volumes may even be counterproductive.
Intensive lifestyle change (diet + exercise) reduced obesity-related cancer risk by 16% in one large trial, largely via weight loss.

New: GLP-1 weight-loss drugs and cancer risk — an unsettled, fast-moving question. Because obesity itself raises risk for at least 13 cancer types, researchers have asked whether GLP-1 receptor agonists (semaglutide/Ozempic/Wegovy, tirzepatide/Mounjaro/Zepbound) reduce cancer risk as a side effect of weight loss. The evidence so far is genuinely mixed:

A 2024 JAMA Network Open study of people with diabetes found significantly lower rates of 10 of 14 obesity-related cancers among GLP-1 users versus insulin users.
An August 2025 JAMA Oncology study (Dai et al.) in adults with obesity found an overall reduced cancer risk with GLP-1 use, particularly for endometrial, ovarian, and meningioma cancers — alongside a possible kidney-cancer signal researchers flagged for further study.
A June 2026 analysis of over 229,000 non-diabetic obese adults found a 41% lower overall cancer risk among GLP-1 users versus diet-and-exercise counseling alone, with tirzepatide showing the largest effect.
Yet a December 2025 Annals of Internal Medicine analysis pooling 48 studies concluded GLP-1 drugs "probably have little or no effect" on risk across 13 obesity-related cancers — directly contradicting the observational findings above, likely due to confounding (GLP-1 users tend to have better healthcare access and lower baseline risk in observational data).

Bottom line: don't start or avoid a GLP-1 drug based on cancer-risk claims in either direction — the honest answer right now is "unclear, actively being studied." Discuss it with your prescribing physician in the context of your metabolic health, not cancer prevention specifically.

Sources: JAMA Oncology 2025 (Dai et al.) · Annals of Internal Medicine, reported Dec 2025 · Johns Hopkins 2020 · British Journal of Sports Medicine 2022

3. Limit or Avoid Alcohol — Now with a Formal Surgeon General Warning

This is the section with the single biggest policy development since our last update. In January 2025, the U.S. Surgeon General issued a formal advisory confirming a causal link between alcohol consumption and at least seven cancers: breast (in women), colorectal, esophageal, liver, mouth, throat, and voice box (larynx). Key points from the advisory:

Alcohol is now identified as the third-leading preventable cause of cancer in the U.S., after tobacco and obesity, contributing to an estimated 100,000 cancer cases and roughly 20,000 cancer deaths annually.
Breast cancer risk rises even at low intake — as little as one drink per day.
Fewer than half of Americans are aware alcohol causes cancer at all, which the advisory attributes partly to decades of messaging that focused on liver disease and drunk driving rather than cancer, and to alcohol-industry lobbying against clearer labeling.
The advisory calls for updated cancer-specific warning labels on alcoholic beverages (a step that would require congressional action) and greater use of alcohol screening in clinical settings.
Reducing or stopping alcohol use appears to lower risk for some alcohol-related cancers over time, though the dose-response reversibility isn't fully mapped yet.

This tightens the picture from our earlier guides, which described alcohol as a "leading modifiable risk factor" in general terms. As of 2025–2026, the message from U.S. public health authorities is more direct: there is no fully "safe" level of alcohol with respect to cancer risk, and risk scales with cumulative lifetime intake.

Sources: U.S. Surgeon General Advisory, January 2025 · ASCO Post coverage · CA: A Cancer Journal for Clinicians 2024

Best Anti-Cancer Supplements: What Does the Evidence Say?

Educational information only, not medical advice. No supplement is a magic bullet, and supplements work best alongside — never as a replacement for — a good diet, regular exercise, and your doctor's guidance. Always consult your physician before starting any new supplement, especially during active cancer treatment.

1. Vitamin D3, K2, and Omega-3

Vitamin D and cancer is one of the more genuinely contested areas in this guide, and the evidence has become more — not less — nuanced with newer data:

Several earlier meta-analyses of RCTs (2019–2022), largely in vitamin D-replete older adult populations taking modest doses, found no significant reduction in total cancer incidence or mortality.
By contrast, a large 2023 review of RCTs found vitamin D3 supplementation reduced cancer mortality by 6% overall, rising to 12% when restricted to studies using daily (rather than bolus) dosing.
A 2024 umbrella review of 71 meta-analyses found strong evidence that vitamin D3 supplementation reduces total cancer mortality (OR 0.90), with highly suggestive evidence for site-specific benefit in head and neck, breast, colorectal, lung, and renal cell cancers.
The 2022 DO-HEALTH RCT found older adults combining daily vitamin D3, omega-3 fish oil, and a simple home exercise program had a 61% reduction in invasive cancer risk over three years — though this tested a combined intervention, not vitamin D alone.

The practical takeaway: dosing pattern (daily vs. infrequent high-dose) and baseline vitamin D status both appear to matter, which likely explains why different trials reach different conclusions. A target serum level of 40–70 ng/mL (100–175 nmol/L) is often cited as reasonable, achieved with 1,000–2,000 IU/day for most adults and adjusted based on blood testing — not the much higher doses used in some treatment protocols. Pair with magnesium and vitamin K2 (MK-7) if supplementing, since these nutrients work together. Omega-3 intake from supplements is generally capped around 1 g/day.

Sources: Systematic review and IPD meta-analysis, 2023 · Umbrella review, Ann Epidemiol 2024 · DO-HEALTH, Frontiers in Aging 2022

2. Turmeric (Curcumin)

Curcumin shows anti-tumor activity across multiple pathways in preclinical models, with over 7,000 PubMed entries and numerous ongoing human trials. A 2022 review of human studies found many clinical trials support benefit against various cancers and reduced chemo/radiation side effects; curcuminoids and turmeric are FDA-recognized as generally safe.

The catch is bioavailability: raw turmeric spice is only ~3% curcumin, and only about 1% of that is absorbed. Bioavailable extracts (with piperine/black pepper, or taken with fat) are far more effective — a typical anti-cancer-research dose is just under a teaspoon of extract, three to four times daily. Interestingly, poor absorption may actually work in curcumin's favor for colon cancer, since it lingers longer in the intestinal tract.

Sources: Arslan et al., 2022

3. Vitamin C

A 2022 umbrella review linked higher vitamin C intake to reduced overall mortality, cardiovascular disease, and several cancers (esophageal, gastric, cervical, lung), with benefit seen at daily increases of just 50–100 mg. The same review flagged a possible link between vitamin C supplement intake specifically and increased breast cancer and kidney stone risk — a reminder that food-source and supplement-source nutrients don't always behave identically. Whole-food vitamin C complexes contain cofactors (enzymes, copper-absorption aids) absent from synthetic ascorbic acid alone.

Sources: Xu et al., 2022 · South Korean cohort study

4. Magnesium and Molecular Hydrogen

A meta-analysis of over 700,000 participants found an inverse association between dietary magnesium intake and colorectal cancer risk. Molecular hydrogen (H₂) is a newer, less-studied area — preclinical work suggests antioxidant and anti-inflammatory anti-cancer effects, and one small human study found hydrogen-rich water may improve radiotherapy outcomes in liver cancer patients. Human evidence here remains limited; treat this as an emerging area rather than an established intervention.

Sources: Tennessee Colorectal Polyp Study · Systematic review, 2023

5. Zinc, Probiotics, and Garlic

Zinc supports immune function and DNA repair, though optimal intake for cancer prevention specifically isn't well defined. A healthy gut microbiome, supported by diet and potentially probiotics, is increasingly linked to cancer risk and treatment response, though specific strain-level effects remain under investigation. Garlic's allicin compound has been linked in observational studies to lower stomach and colorectal cancer risk, though robust human trials are still needed.

Source: Nature 2018

Other Important Recommendations for Cancer Prevention

Prioritize quality sleep: chronic sleep deprivation disrupts hormones, weakens immunity, and increases inflammation. Aim for 7–9 hours nightly.
Stay current on screenings: mammograms, colonoscopies, Pap smears, and age/risk-appropriate screening catch disease early, when outcomes are best.
Minimize toxin exposure: air pollution, occupational chemicals, and excess pesticide exposure are modifiable where possible.
Reduce unnecessary radiation: limit non-essential imaging (X-rays, CT scans) and protect skin from excessive UV exposure.
Manage stress: chronic stress weakens immunity and promotes inflammation — exercise, meditation, and time in nature all help.
Treat chronic infections: HPV (cervical cancer) and H. pylori (stomach cancer) are both established, treatable cancer risk factors.

Evidence Summary Table (CEBM-Graded)

A snapshot of how strong the underlying evidence is for each major intervention discussed above, graded using the Oxford Centre for Evidence-Based Medicine (CEBM) hierarchy.

Intervention	CEBM Evidence Level	Direction of Effect
Tobacco cessation	1a (systematic reviews of cohorts)	Strong risk reduction
Alcohol reduction/avoidance	1a (Surgeon General advisory synthesis)	Risk reduction, 7 cancer types
Mediterranean/plant-based diet	1a (umbrella reviews)	Risk reduction
Reducing ultra-processed foods	2a (umbrella review + growing cohort data)	Probable risk reduction
High dietary fiber (25–29g/day)	1a (review of 100+ studies)	Risk reduction
Regular aerobic + strength exercise	1a	Risk reduction
Vitamin D3 supplementation	1a, but conflicting umbrella reviews	Mixed / mortality benefit more consistent than incidence
Curcumin (bioavailable)	2b–3 (human trials + strong preclinical)	Promising, not conclusive
Ketogenic/fasting diets for prevention	3–4 (mixed cohort + preclinical)	Unclear / possibly cancer-type-dependent
GLP-1 drugs for cancer risk reduction	2b, directly contradicted by other 2b studies	Unsettled — do not use for this indication

Key Takeaways: Your Personalized Blueprint for Prevention

Cancer prevention isn't one magic bullet — it's a holistic, multi-modal approach. Here's the actionable summary:

Nourish your body: a plant-rich diet — colorful vegetables, whole fruits, whole grains, legumes — ideally Mediterranean-style.
Limit the unhealthy: significantly reduce ultra-processed foods, sugary drinks, refined grains, and excess red/processed meat.
Rethink alcohol: given the 2025 Surgeon General advisory, treat any alcohol intake as carrying some cancer risk, and minimize it accordingly.
Never use tobacco in any form; quit now if you currently do.
Move daily: 150 min/week moderate aerobic activity (or 75 min vigorous), plus 30–60 min/week strength training.
Consider strategic, doctor-approved supplements: vitamin D3 (~2,000 IU/day, adjusted to blood levels, ideally with K2 and magnesium), omega-3s (~1 g/day), bioavailable curcumin, and green tea catechins (~500 mg/day, taken with food).
Prioritize sleep and manage stress — both measurably affect immune function.
Stay current on screenings and address chronic infections (HPV, H. pylori) promptly.

No single change eliminates risk entirely — this is a continuous, cumulative effort between your immune system and cellular processes, not a one-time fix. Each person's biology and health status differ, so treat this as a framework to discuss with your healthcare provider, not a rigid prescription. For a broader resource organized by cancer type and body system, see our cancer types resource hub, and for the full 1,000+ reference version of this guide, see the I-PREVENT CANCER Protocol.

Frequently Asked Questions

What are the most evidence-based ways to lower cancer risk?

Avoiding tobacco, limiting alcohol, maintaining a healthy weight through diet and exercise, eating a fiber-rich Mediterranean-style diet low in ultra-processed foods. These factors have the strongest, most consistent human evidence behind them, well ahead of any single supplement.

Does alcohol really cause cancer, even in small amounts?

Yes. The January 2025 U.S. Surgeon General advisory identifies alcohol as a direct cause of at least seven cancers, with breast cancer risk rising at intake as low as one drink per day. There is no fully risk-free level of alcohol consumption with respect to cancer.

Are ultra-processed foods linked to cancer?

A growing body of evidence, including a 2024 umbrella review and multiple 2025–2026 cohort studies (colorectal, breast cancer, and cancer survivor mortality), links higher ultra-processed food intake to increased cancer risk and worse outcomes. It's an association, not proven causation, but the consistency across independent studies is notable.

Should I take vitamin D, curcumin, or other supplements to prevent cancer?

The evidence is promising but mixed rather than definitive. Vitamin D3 shows more consistent benefit for cancer mortality than for preventing incidence, and daily dosing appears to matter. Curcumin and vitamin C show encouraging signals with important caveats (bioavailability for curcumin; supplement-form vitamin C's mixed breast cancer signal). Discuss any supplement plan with your doctor rather than self-prescribing.

Does intermittent fasting or a ketogenic diet reduce cancer risk?

The evidence is still genuinely controversial. Some preclinical data suggest metabolic benefits, but at least one large cohort study linked low-carbohydrate diets to higher colorectal and lung cancer risk while lowering stomach cancer risk. These approaches aren't recommended if you're underweight, and long-term safety data in humans remain limited.

Can losing weight with GLP-1 drugs like Ozempic reduce cancer risk?

It's unresolved. Several observational studies (2024–2026) show lower rates of obesity-related cancers among GLP-1 users, but a December 2025 analysis pooling 48 studies found "little or no effect" on the same cancers. Don't start or avoid these drugs based on cancer-prevention claims either way — discuss them with your doctor for their approved metabolic indications.

What percentage of cancer is actually preventable?

Based on 2024 GLOBOCAN data analyzed by IARC and the American Cancer Society, roughly 40–50% of cancer deaths worldwide are attributable to modifiable risk factors — primarily tobacco, alcohol, excess body weight, physical inactivity, poor diet, and untreated infections.

AI Personalization Guide

If you found this guide through Claude, ChatGPT, Gemini, or Perplexity, here's how to get a more tailored answer from your AI assistant:

Claude / ChatGPT: ask it to cross-reference the evidence summary table above against your specific risk factors (family history, current diet, medications) for a personalized priority list.
Gemini: ask it to pull your recent activity/sleep data (if connected) alongside the exercise and sleep targets in this guide to flag gaps.
Perplexity: ask it to check for research published after this guide's last update (August 2026) on any single section — alcohol, UPFs, and GLP-1/cancer research are the fastest-moving areas here and worth re-checking periodically.

Medical Disclaimer

This guide is for educational purposes and is not personal medical advice. It does not replace consultation with your doctor or oncology team. Individual risk factors, family history, and health status vary — a strategy that's reasonable for one person may not be for another. Always consult a qualified healthcare professional before changing your diet, starting or stopping any supplement, or making decisions related to cancer prevention, screening, or treatment.

This guide consolidates and updates two previously separate Cancer Advisor articles ("Cancer Prevention: How to Lower Your Cancer Risk Naturally" and "Cancer Prevention: Foods, Supplements, Diet and Lifestyle Strategies") into a single, current resource.

Disclosure: Some links in this article are affiliate links, including The Wellness Company (referral code ONEDAYMD) and Amazon Associates. If you make a purchase through these links, we may earn a commission at no additional cost to you. This does not influence our editorial content or evidence assessments.