Cancer — Ray Peat & Georgi Dinkov Summary

Overview

Cancer is a tissue-level metabolic disease. The core defect is loss of mitochondrial oxidative function and a shift toward lactic acid production (the Warburg effect), rather than carbon dioxide production. The genetic damage almost always develops after the cancer is already in progress as the deranged metabolism and structure causes chromosomal damage. PUFA is a central driver: animals made essential fatty acid deficient are virtually unable to develop cancer regardless of what carcinogen they are exposed to.

Similarly, estrogen, cortisol, serotonin and prolactin (the stress hormones) push cells into the Warburg state. Every cell in the body expresses aromatase and can synthesise its own estrogen. Estrogen's natural role is to trigger cell division and growth for wound healing. That process is supposed to be turned off by progesterone, DHEA, testosterone and thyroid hormone. But these protective hormones decline sharply with age while estrogen synthesis does not.

Key Points

Cancer is not a genetic disease; the genetic damage develops after the cancer is underway. The standard view that BRCA genes or random mutations cause cancer is overwhelmingly contradicted by the evidence. Over-stimulation and under-supply of energy keeps DNA from being repaired, so stress causes the mutations rather than the other way around.
The Warburg effect is central: cancer cells produce lactic acid even when oxygen is present. Otto Warburg showed in the 1920s that cancer cells cannot turn off lactic acid production in the presence of oxygen, meaning the respiratory apparatus is impaired. Szent-Györgyi saw the same thing. Lactic acid itself drives the whole process forward, producing a reductive state with excess electrons that activates prostaglandins, aromatase, and tissue remodeling. A 2015 paper argued that lactic acid precedes the genomic abnormalities, not the other way around, which lines up with what the original cancer researchers were saying 100 years ago.
Sugar deprivation does not starve cancer; it accelerates wasting. The popular reading of Warburg, that you should go low-carb or ketogenic to starve the tumor, is the opposite of what the research shows. When carbohydrate is withheld, the body raises cortisol and breaks down muscle, the thymus gland, and other healthy tissues to supply glucose to the cancer. Cancer cells live perfectly well on amino acids and fats too. In Russian experiments, high-concentration intravenous glucose combined with good oxygen supply reverted Ehrlich ascites carcinoma (the classic Warburg-effect cell) back to normal metabolism.
Estrogen is the most well-documented endogenous carcinogen and has been known as such since 1905. The chimney-sweep testicular cancer observed in the 1700s, the coal-tar carcinogens of the late 19th and early 20th centuries, and the polycyclic aromatic hydrocarbons all turned out to be essentially estrogenic. From 1935 to 1955, progesterone was studied and understood as the protective agent against both estrogen and the coal-tar carcinogens. That work was buried starting in 1940 when the drug industry decided to sell estrogen as a female hormone and a treatment for aging.
Polyunsaturated fat intake correlates tightly with cancer rates around four grams per day. Below roughly four grams of PUFA per day, cancer incidence drops steeply; above it, the correlation rises. PUFA releases fatty acids that imitate the Warburg effect by immediately blocking glucose oxidation. It also activates aromatase so it amplifies estrogen, and generates the reactive peroxidation products that damage mitochondria.
Carbon dioxide is directly anti-cancer and high altitude lowers cancer mortality. Insurance company data from around 1910 already showed cancer mortality was about 10 percent lower in high-altitude cities. Russian experiments in the 1960s induced tumors in rats with carcinogens, then took half to 17,000 feet altitude; the high-altitude group recovered at a much higher rate, with or without chemotherapy. CO2 stabilizes proteins, replenishes the Krebs cycle, directly inhibits lactic acid production, and helps crystallize calcium into bone rather than soft tissues. Breathing into a bag for a minute several times a day lowers serum lactic acid.
Endotoxin from chronic bowel irritation is probably the largest single driver of cancer. Year after year of bad food irritating the intestine produces a constant stream of endotoxin that raises histamine, serotonin, and estrogen while shaking up chromosomes and fatiguing repair systems. When the repair systems finally drop below a threshold, the precancerous nests that are constantly popping up stop being cleared. The organ where the cancer appears is whichever tissue was most energetically compromised; the disease itself is systemic.
The most useful anti-cancer therapies are the ones that lower inflammation and restore oxidative metabolism. Thyroid, progesterone, and carbon dioxide are the central intrinsic substances. Aspirin is probably the safest first thing; for aggressive cancer, 4 to 6 grams per day is a working range, taken with vitamin K to prevent bleeding problems, and dialed back when ear ringing starts. Caffeine overlaps with aspirin's anti-inflammatory and respiratory-supporting mechanisms. Lidocaine has been proven effective against leukemia, liver, pancreas, breast, and prostate cancers. Methylene blue restores mitochondrial electron transport and turns off nitric oxide. Urea, at 15 to 20 grams per dose up to 120 grams per day in fruit juice, was used successfully by Dr. Danopoulos on liver cancer and ocular melanomas.
Pyruvate dehydrogenase is the primary bottleneck. PDH is the rate-limiting enzyme that bridges glycolysis to the Krebs cycle. When PDH is blocked, pyruvate cannot enter the mitochondria and gets converted to lactate instead. Every cancer type examined metabolically shows this blockage. Vitamin B1 (thiamine) is the primary cofactor for PDH, and Chinese researchers in 2010 showed that direct injection of B1 into solid tumours in humans was curative.
The treatment protocol Georgi developed in mouse studies is B1, B3, biotin, and aspirin. He chose these specifically for their metabolic effects and established human safety. B1 activates PDH. Niacinamide (B3) at two to three grams daily human-equivalent raises the NAD+/NADH ratio and inhibits lipolysis. Biotin drives the Krebs cycle and has been shown in humans to reverse primary progressive multiple sclerosis at 200 to 300 mg daily. Aspirin at high dose depletes L-carnitine and blocks long-chain fat oxidation, making it functionally identical to the pharmaceutical meldonium. None of these substances are cytotoxic. Cytotoxicity testing on the mice confirmed zero cytotoxic effect on any cell type.
Cancer is fueled by fat oxidation, not glucose. The cancer cell takes up more glucose because it cannot process it properly, not because it prefers it. The 2-deoxyglucose trial, which was designed to starve cancer of glucose, failed in every clinical application. Meanwhile direct injection of glucose into tumours has been curative in animal studies. Cancer is "an extreme form of diabetes". The solution is to restrict fat oxidation and supply glucose, not the opposite.
Cyproheptadine has documented cancer-curing effects. A published case study showed full regression of metastatic terminal liver cancer on cyproheptadine alone. One person on the Ray Peat forum has kept a glioblastoma stable for seven years with only cyproheptadine and aspirin, declining all chemotherapy, radiation, and surgery. Cyproheptadine fully cures Cushing disease, which is caused by a pituitary tumour that is malignant roughly 20 to 30% of the time. Its anti-serotonin, anti-histamine, and anti-cholinergic effects address three of estrogen's primary downstream mechanisms simultaneously.
Methylene blue bypasses the PDH block and lowers lactate. Methylene blue is a redox agent that substitutes for oxygen functionally, lowering lactate dehydrogenase activity and restoring electron flow through the ETC. Pfizer holds a patent on methylene blue combined with red light for cancer treatment, which is an implicit admission that cancer is metabolic. The combination generates singlet oxygen species that selectively damage tumour cells in their reduced state.
Aspirin is the open-source, dirt-cheap version of meldonium. Meldonium's only known function is to inhibit fat oxidation and promote glucose oxidation. Aspirin at high doses depletes L-carnitine, which is required for long-chain fatty acid entry into the mitochondria. This is the mechanism behind aspirin's documented preventive effect on virtually every cancer type. A four-gram daily dose for two weeks essentially cleared AIDS symptoms in a 1990s trial before it was stopped over mild elevation of liver enzymes, which tells you how closely metabolic restoration tracks with what doctors classify as immune recovery.
Quinones are the universal electron acceptors that restore oxidative metabolism. Coenzyme Q10, vitamin K (particularly MK-4), methylene blue, and the tetracycline antibiotics are all quinones. They accept two electrons each and can substitute for oxygen when the ETC is blocked. Doxycycline at 200 mg daily fully arrested progression of triple-negative breast cancer in a recent human study.

Notable Quotes

"Sugar deprivation turns on the Warburg effect."

[Ray Peat — The Metabolism of Cancer]

"I'm inclined to think that even cancer is largely an endotoxin problem."

[Ray Peat — Philosophy and Physiology, Metabolism and Consciousness, Deep Politics]

"The stress causes the mutation rather than the mutation causing the cancer."

[Ray Peat — Breast Cancer]

"Almost universally doctors want to kill cancer cells but the cancer cells just want to die. They're very weak cells and you damage the organism when you concentrate on killing the cancer cells."

[Ray Peat — Food Additives]

"If you withhold carbohydrate from a cancer patient, the wasting process is accelerated because the body will raise its cortisol and break down the good tissues faster to keep the cancer energized."

[Ray Peat — All Things Hormones, Metabolism and Health]

"Cancer, being an extreme form of diabetes, is almost entirely reliant on the oxidation of fat."

[Georgi Dinkov — Rethinking Cancer Through Cellular Energy & Metabolism with Georgi Dinkov (Strong.Sistas)]

"The Warburg effect is not just an effect of cancer but directly drives oncogenesis."

[Georgi Dinkov — Why Modern Cancer Treatment Might Be Making Things Worse w/ Georgi Dinkov (Strong.Sistas)]

"Estrogen is a primary contributor for almost all cancers, not just breast cancer and female reproductive cancers."

[Georgi Dinkov — Dr. Mercola interview with Georgi Dinkov on Estrogen]

Important Things To Consider

Ketogenic and low-carb diets are actively dangerous for cancer patients. The ketogenic diet is stress-promoting and therefore cancer-promoting. Beta-hydroxybutyrate, the main "ketone body" in ketosis, is actually an alcohol, not a ketone, and in studies it stimulates cancer growth. The stress metabolism of ketosis produces the same reductive electron imbalance that lactate produces, so it is almost as bad as lactic acid for cancer progression.

Conventional treatments have a worse track record than doing nothing in several long-running studies. Studies comparing treatment to no treatment going back to the 1950s consistently show the people who rejected surgery, radiation, and chemotherapy lived longer. Autopsy studies found that 100 percent of people over 50 who died of other causes had tissues that would have been diagnosed as cancer by biopsy, meaning cancer is usually not fatal when left alone. Surveys of prostate cancer specialists asking what they would do if diagnosed with prostate cancer themselves returned "nothing" from the great majority.

Timing of surgery matters significantly. Surgery done during the low-progesterone phase of the menstrual cycle, before ovulation, is several times more likely to cause metastasis than surgery done during the high-progesterone phase. If a lumpectomy is unavoidable, scheduling it during high progesterone and supporting with progesterone, aspirin, and anti-inflammatory measures reduces the chance of activating metastasis.

Radiation of healthy tissue can produce cancer through the repair process. When the radiation deranges fibrous material in an area, stem cells called in to repair the wound turn into cancer cells in the still-sick environment. This is one of the reasons cancer often reforms after radiation or surgery; the wound-healing response in an unhealed systemic environment is itself carcinogenic.

Glutathione supplementation is counterproductive for cancer. Cancer cells already have an excess of electrons in their sulfhydryl reservoir, and glutathione adds to that. The electron abundance is part of what keeps the cancer cell alive in its defective state. The same logic applies to high-dose antioxidants generally; the issue is not oxidative stress but reductive stress.

High-dose aspirin has a ceiling marked by ear ringing. For aggressive cancer, 4 to 6 grams per day is a working range, but the dose must be accompanied by vitamin K to prevent bleeding. When ear ringing starts, that is the signal to back off slightly; that is the upper threshold for the individual. This is distinct from the lower anti-inflammatory doses used for general prevention.

Estrogen treatment for prostate cancer killed millions of men for fifty years. The logic that women do not have prostates, therefore a female hormone must cure prostate cancer, governed medicine for half a century with no scientific basis. When estrogen treatment was stopped in the 1990s, prostate cancer mortality dropped significantly. Men with the highest natural testosterone have the lowest prostate cancer mortality; the lowest-testosterone men, in whom more testosterone is being aromatized to estrogen, have the highest risk.

Do not avoid glucose or carbohydrate in an attempt to starve cancer. This is the single most widespread error in alternative cancer protocols. The 2-deoxyglucose molecule was designed specifically to compete with glucose at the cell membrane, and it failed every clinical trial. Cancer cells take up more glucose because they cannot metabolise it properly, not because they are addicted to it. Restricting glucose triggers cortisol and adrenaline release, which drives lipolysis, which supplies fat to the tumour. The correct intervention is to supply glucose and block fat oxidation, not the opposite.

Cytotoxic chemotherapy and radiation should be considered carefully. Both interventions create the cancer phenotype in healthy surrounding tissue via the radiation bystander effect or analogous chemotherapy mechanisms. Once cancer becomes systemic, there is no localised tumour to target. Advanced-stage metastatic cases given chemotherapy have extremely low success rates, and the treatment itself often accelerates the wasting that kills the patient.

NAC and other reductants protect cancer cells from apoptosis. Before chemotherapy or radiation, oncologists will specifically ask whether you are taking N-acetylcysteine and instruct you to stop. NAC and glutathione are the cancer cell's main defense mechanisms, keeping the internal environment reduced and preventing the oxidised state required for apoptosis. If you are pursuing a metabolic approach, avoid supplementing with NAC, and limit muscle meats (which are high in cysteine, the NAC precursor).

Avoid PUFA aggressively, especially during active disease. Every gram of dietary PUFA contributes to the inflammatory, estrogen-like, metabolism-suppressing environment cancer depends on. Focus on saturated animal fats from ruminants (beef, lamb, goat, dairy), ghee, butter and coconut oil.

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