Mr. Song, 45 years old, was diagnosed with prostate cancer over a year ago. Although he underwent surgery, his recovery has not been particularly smooth. Occasional flare-ups of symptoms have left him in considerable distress. Recently, Mr. Song heard about the ketogenic diet from a friend, who claimed it could effectively combat tumors. However, feedback from patients who tried it varied—some reported positive results while others did not—leaving him uncertain whether it would suit him.Dr. Song is confused. With no better treatment options currently available, should he try this "ketogenic diet"?
What is the "ketogenic diet"?
The so-called ketogenic diet therapy is a dietary plan high in fat, low in carbohydrates and protein, yet rich in essential nutrients for the body.In recent years, fueled by endorsements from many bloggers, it has rapidly gained public attention and become a popular weight-loss method. However, the ketogenic diet was not originally intended for weight loss.
The ketogenic diet originated for epilepsy treatment
The ketogenic diet was not originally developed for weight loss. In 1921, it was first used to treat epilepsy. This specialized diet aims to prompt the body to use fat as its primary energy source, converting fat into ketones for brain utilization while reducing reliance on sugar and protein.
The physician who first employed this method was Dr. Russell Wilder from the Mayo Clinic in the United States. In his published paper, he proposed that the ketogenic diet mimics the metabolic effects of starvation, thereby suppressing epileptic seizures. The radical change in dietary composition alters the brain's energy supply system, stimulating the nervous system and reducing the frequency of seizures.
Clinically, the ketogenic diet has seen extensive experimentation and application. Survey data indicates its implementation across more than 40 countries and regions spanning all six continents.
Beyond epilepsy, research reports indicate the ketogenic diet therapy has been explored in treating malignant tumors, autism, intellectual disability, behavioral disorders, spinal cord injuries, Alzheimer's disease, obesity, diabetes, and polycystic ovary syndrome. Most studies demonstrate favorable safety profiles and therapeutic efficacy.However, clinical application of the ketogenic diet is subject to strict restrictions and must be conducted under the guidance of a nutritionist.
Can the ketogenic diet fight cancer?
Research indicates the ketogenic diet's anti-cancer effect stems from tumor cells relying primarily on glycolysis for metabolism even under oxygen-rich conditions. Due to mitochondrial defects in tumor cells, they cannot utilize ketone bodies for energy, making them increasingly dependent on glucose.
Therefore, from this perspective, providing cancer patients with a diet rich in fats, low in carbohydrates, and moderate in protein can indeed have therapeutic effects on tumors. This dietary approach is the ketogenic diet.
Its theoretical basis is that cancer cells rely on glucose for growth and metabolism, and glucose requires carbohydrates for conversion. By reducing carbohydrate intake, less glucose is converted.This forces the body to utilize ketone bodies for energy. Cancer cells cannot utilize ketone bodies effectively, whereas normal cells can. This approach aims to "starve" cancer cells while preserving normal cells.
However, there is a significant gap between theoretical rationale and practical efficacy. Ketogenic therapy is currently primarily studied in animal experiments and extreme case studies. Success in animal studies is unlikely to translate directly to human applications.
Most patients still require chemotherapy and radiation therapy after surgery. Completed clinical trials suggest that a calorie-restricted ketogenic diet may be a promising anti-cancer approach. It could synergize with current chemotherapy and radiation therapies, potentially becoming an adjunct to standard cancer treatment. However, its implementation requires professional guidance from physicians and nutritionists.
It must be clearly stated that cancer patients should not privately use or alter their treatment plans.
Blindly attempting a ketogenic diet by merely reducing staple food intake often leads to insufficient protein and fat consumption, resulting in severe nutrient deficiencies. This can increase risks such as persistent weight loss, weakened immunity, poor quality of life, and reduced tolerance to anticancer treatments. For patients aiming to starve tumor cells, they may end up starving themselves first.Data indicates a high incidence of malnutrition among cancer patients, with 20% dying directly from malnutrition.
So how should cancer patients eat?
1. Ensure adequate food intake and nutrient absorption: Some patients with inherently weak constitutions or impaired postoperative bodily functions may struggle to absorb nutrients from regular foods. Consult your doctor about supplemental nutrients.
2. Diversify and balance food choices: Aim for a variety of foods daily, with two-thirds plant-based and one-third animal-based. This supports tissue repair, though portion sizes should be adjusted based on individual needs.
3. Reasonable dietary restrictions: Claims that cancer patients should avoid "trigger foods" due to cancer recurrence lack scientific basis. Restrictions should be scientifically grounded and tailored to season, region, and constitution. Examples include avoiding excessive warming foods in summer, cold foods in winter, and heat-inducing, yin-depleting foods for lung cancer patients.
Research indicates that 50% of cancer patients experience weight loss at diagnosis. Providing appropriate dietary planning and nutritional support during treatment helps improve physical condition. When considering adjustments to certain therapies, a comprehensive assessment by a professional physician or nutritionist is essential before making decisions based on their recommendations.