Ray Peat on Cancer

Short answer: Ray Peat approached cancer as a metabolic and systemic disease, not as the work of one mutant cell. He wrote about the respiratory defect described by Otto Warburg, the roles of estrogen, lactic acid and polyunsaturated fat, and protective factors such as progesterone, aspirin and carbon dioxide.

What Ray Peat wrote about cancer

He criticized the doctrine of the mutant cell, which leads to the idea that only something that kills cancer cells can cure cancer. Source: Preventing and treating cancer with progesterone

He went back to Otto Warburg, who showed in the 1920s that a respiratory defect, with cells making lactic acid even when oxygen is present, is a basic feature of cancer. Peat's interest was in what causes that defect. Source: Lactate vs. CO2 in wounds, sickness, and aging; the other approach to cancer

He wrote that lactate itself produces signals that promote growth, and he set carbon dioxide against lactate as the other approach to cancer. Source: Lactate vs. CO2 in wounds, sickness, and aging; the other approach to cancer

He named radiation, estrogen and a range of chemical pollutants as the major known causes of breast cancer. Source: Breast Cancer

He described research from the 1930s onward, in primates as well as rodents, showing estrogen as carcinogenic and progesterone as protective. Source: Preventing and treating cancer with progesterone

He stressed removing polyunsaturated fats, which he wrote takes years to clear from the tissues, and noted that aspirin and salicylic acid block many of their carcinogenic effects. Source: Preventing and treating cancer with progesterone

He treated the tissue around a tumor as part of the disease. Collagen becomes more abundant and stiffer with age, and he connected that stiff matrix to the rise of cancer with aging. Source: The Cancer Matrix

He noted that before treatment became practically obligatory, some people lived into old age with clearly malignant tumors and died of something else. Source: Breast Cancer

What he suggested in practice

• This page describes his published views. It is not treatment advice. Cancer needs an oncologist.
• The factors he wrote about reducing: polyunsaturated fat, estrogen exposure, endotoxin, radiation.
• The factors he wrote about supporting: thyroid function, progesterone, carbon dioxide, sugar oxidation, aspirin, niacinamide.

Where he wrote about it

This topic comes up in 92 of the articles on his site. These are the most relevant ones:

• Estrogen, progesterone, and cancer: Conflicts of interest in regulation and product promotion · original on raypeat.com ↗
• Breast Cancer · original on raypeat.com ↗
• Cancer: Disorder and Energy · original on raypeat.com ↗
• Preventing and treating cancer with progesterone · original on raypeat.com ↗
• Prostate Cancer · original on raypeat.com ↗
• The Cancer Matrix · original on raypeat.com ↗
• RU486, Cancer, Estrogen, and Progesterone · original on raypeat.com ↗
• Lactate vs. CO2 in wounds, sickness, and aging; the other approach to cancer · original on raypeat.com ↗

Quick answers

What did Ray Peat say about cancer?

That it is a systemic, metabolic disease built on a defect in cellular respiration, promoted by estrogen, lactic acid, polyunsaturated fats and radiation, and opposed by progesterone, thyroid, carbon dioxide and aspirin.

Did Ray Peat recommend aspirin for cancer?

He wrote that when people with cancer asked for his recommendations he told them to use aspirin, and he cited research on its anti-metastatic effects. That is his view, not medical advice.