Dr. Eric Berg's 5 Diet Strategies for Cancer: Matching Food to What Each Cancer Burns

Different cancers lean on different fuels. Dr. Eric Berg's free guide matches five eating styles to those fuels. Here's what he recommends, the foods every plan shares, what the research shows, and what to know before you start.

MK Wellness InsightsFounded by Danielle Cordova, Cypress, TX

Dr. Eric Berg is one of the most-followed health educators online, known for his work on keto, intermittent fasting, and nutrition, with more than 6,000 videos since 2008. He earned his Doctor of Chiropractic degree from Palmer College of Chiropractic in 1988 and has since stepped away from clinical practice to focus on education (his bio).

One of his most useful free resources is 5 Diet Strategies for Cancer Care (updated April 2026). It takes the metabolic approach to cancer, the idea that what feeds a cancer cell matters, and turns it into food you can actually cook. Here's what it says, in plain language. These are his views, and his guide is meant to work alongside treatment, with your oncology team.

The Idea in One Minute

Cancer cells need fuel to grow, and they don't all burn the same thing. Dr. Berg groups cancers by the fuel they lean on most:

• Glucose (sugar)
• Glutamine (an amino acid from protein)
• Lipids (fats)
• Ketones (what the body makes from fat during keto and fasting)
• BCAAs (branched-chain amino acids, found mostly in protein foods)

Each of his five diets limits one of those fuels. Because some cancers can switch fuels, he suggests rotating between diets, and he adds fasting, or a "polyphenol burst" of plant foods for people who can't fast.

The Five Diet Strategies

1. Anti-glucose. Very low in carbohydrates, like a strict ketogenic diet: non-starchy vegetables, healthy fats like olive oil, avocado, coconut oil, grass-fed butter, and nuts, moderate protein, and no snacking. His top foods: cruciferous vegetables, mushrooms (shiitake, maitake, turkey tail), garlic and onions, oily fish, and herbs like rosemary and turmeric.

2. Anti-glutamine. Plant-based, with little to no animal protein. Plenty of broccoli sprouts, cabbage, kale, berries, seeds, and spices, with hibiscus, green, and turmeric teas every day.

3. Anti-lipid. Low in total fat, with no seed oils (canola, corn, cottonseed, grapeseed, sunflower) and fewer animal and dairy fats. Mostly vegetables and plant foods, plus omega-3s from oily fish, flaxseed, and chia.

4. Anti-ketone. For cancers that can burn ketones, which he describes as usually late-stage or aggressive: avoid staying in ketosis for long periods, keep fat moderate, and build meals on vegetables, berries, and herbs, with periodic fasting.

5. Anti-BCAA. Plant-based and lower in protein: no meat, poultry, eggs, or whey protein, with polyphenol-rich vegetables, fruits, herbs, and seeds.

His guide includes a sample day of meals for each diet, and timing for the rotations and fasting periods. We don't repeat protocols here; see his guide and review it with your team.

How He Matches Cancer Types

Here's how his guide groups cancers. Some appear in more than one group, which is why he rotates diets.

• Glucose-dominant: glioblastoma, KRAS-positive colorectal, ER-positive breast, lung adenocarcinoma, head and neck, and cervical cancer. He pairs the anti-glucose and anti-glutamine diets. Nutrients he highlights: berberine, quercetin, resveratrol, EGCG (green tea extract), cinnamon, and alpha-lipoic acid.
• Glutamine-dominant: pancreatic cancer, triple-negative breast cancer, melanoma, and leukemia and lymphoma. He pairs the anti-glucose and anti-glutamine diets. Nutrients he highlights: EGCG, curcumin, apigenin, baicalein, sulforaphane, and honokiol.
• Lipid-dominant: prostate, ovarian, ER-positive breast, and liver cancer. He leads with the anti-lipid diet, with an optional anti-glucose phase. Nutrients he highlights: EGCG, quercetin, resveratrol, curcumin, omega-3s, genistein (soy, which he cautions against in ER-positive breast cancer), and garcinol.
• Ketone-dominant: advanced or metastatic breast and ovarian cancer, metastatic cancers, SCOT-positive glioblastoma, bladder cancer, osteosarcoma, and gliomas. He rotates the anti-glucose, anti-glutamine, and anti-ketone diets. Nutrients he highlights: alpha-lipoic acid, hydroxycitrate (garcinia), spirulina, red algae, black seed oil, and allicin (garlic).
• BCAA-dominant: AML and CML leukemias, some lung cancers, gliomas, and liver cancer. He pairs the anti-glucose and anti-BCAA diets. Nutrients he highlights: EGCG, curcumin, quercetin, resveratrol, apigenin, and berberine.

He doesn't list doses for these nutrients, and neither do we.

What the Five Plans Share

Look across the five diets and the same foods keep showing up. This common ground is a gentle place for anyone to start:

• Cruciferous vegetables, especially broccoli sprouts, plus cabbage, kale, cauliflower, and bok choy
• Berries and pomegranate
• Garlic, onions, and leeks
• Herbs and spices: turmeric, rosemary, oregano, thyme, ginger, and cinnamon
• Green tea and herbal teas
• Organic produce, to lower pesticide exposure

His list of foods with anti-cancer properties adds beets, black cumin, cocoa, extra-virgin olive oil, flaxseed, mushrooms, citrus, red grapes, sesame, and tomatoes. It also includes grapefruit, which interacts with many medicines, including some cancer drugs (FDA). Check with your pharmacist before adding it.

What the Research Shows

Cancers really do use different fuels. The idea behind his guide comes from decades of laboratory research:

• Glucose: many cancers burn sugar at high rates even when oxygen is available, known as the Warburg effect (Trends in Biochemical Sciences, 2016).
• Glutamine: many cancer cells depend on glutamine, and drugs that block its use are in clinical trials (Nature Reviews Cancer, 2016).
• Fats: prostate cancer tends to rely more on fat metabolism than on sugar (Biochimica et Biophysica Acta, 2013).
• Ketones: in lab and mouse studies, breast cancer cells able to reuse ketones grew and spread more (Cell Cycle, 2012).
• BCAAs: an enzyme that breaks down branched-chain amino acids drives growth in some gliomas (Nature Medicine, 2013) and in some myeloid leukemias, where it predicted outcomes in patients (Nature, 2017).

Diet in people. Matching a diet to a cancer's fuel is still an experimental idea, built mostly on lab research, and doctors don't yet use a standard test to match a diet to a cancer's fuel. Diet alongside treatment has encouraging human research: in a randomized trial of 131 women with breast cancer, a short fasting-mimicking diet around chemotherapy improved tumor response without adding side effects (Nature Communications, 2020).

What to Know Before You Start

• Bring this to your oncology team and an oncology dietitian. Ask: "Which of these ideas fit my cancer and my treatment?"
• Protect your strength first. Many people lose weight and muscle during treatment. Strict diets, low-protein plans, and fasting can make that worse, so get your team's help to do them safely.
• Supplements can interact with treatment. For example, in lab studies, green tea polyphenols like EGCG blocked bortezomib (Velcade), a drug for multiple myeloma (Blood, 2009). Bring every bottle to your oncology pharmacist before adding anything.
• Watch grapefruit, and follow his own caution about soy isoflavones in ER-positive breast cancer.

Our view: the terrain is everything, and food is the part of it you shape three times a day. Dr. Berg's guide turns the metabolic approach to cancer into real meals, and its common ground (cruciferous vegetables, berries, herbs, and green tea) is a wise place for anyone to start. The fuel-matching itself is cutting-edge and still being studied, so personalize it with your oncology team.

How This Fits at MK Wellness

We don't diagnose or treat cancer, and we don't prescribe diets. What we offer is support: a calm place for comfort, recovery, and quality of life alongside your care. Our Cancer Support Toolkit walks you through food, your team, and every option step by step, and our Lower Your Cancer Risk toolkit covers prevention for your family. When you need something we don't offer, we connect you with people we trust.

Go Deeper

• 5 Diet Strategies for Cancer Care, Dr. Berg's free guide (PDF, April 2026)
• His related free guides: Advanced Colon Cancer Diet and Understanding Cancer
• The Cancer Support Toolkit and Holistic and Alternative Cancer Support
• Ketosis and fasting: when they help, and who should skip them

MK Wellness services are non-medical and not intended to diagnose, treat, cure, or prevent cancer or any other condition. This article summarizes Dr. Eric Berg's published views and related research for educational purposes. It deliberately includes no doses or protocols. Talk with your oncology team before changing your diet or adding supplements during cancer care.

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