The Medical Advisor

Cancer is no longer just a battle of chemotherapy vs. tumors. Modern oncology is uncovering a hidden battlefield inside the tumor microenvironment —one defined not by mutations but by metabolism . Many tumors deploy what researchers now call a “lactate shield” , producing excess lactate that suppresses immune cells and protects the cancer from attack. But there’s growing interest in whether dietary interventions—specifically ketogenic diets—could weaken this shield, restore immune function, and improve treatment outcomes . In this article, we’ll explore: How tumors exploit glucose metabolism to evade the immune system Why lactate is toxic to NK cells and other immune effectors The mechanistic rationale for ketogenic diets in cancer What clinical trials reveal about safety, feasibility, and potential benefits Emerging links to immunometabolism and combination therapies The Tumor’s Metabolic Weapon: The Lactate Shield Most people know cancer as a disease of genetic mutations—but tumors a...

Introduction: A Broader View of Cancer Biology Traditional oncology often focuses on genetic mutations and targeted therapies. While mutations are critical, emerging research shows that cancer is also a disease of metabolic dysfunction and immune dysregulation. Understanding these systemic drivers can inform investigational therapies, repurposed drugs, and adjunctive strategies. This perspective — supported by researchers like Dr. Thomas Seyfried and others — sees cancer as a disorder rooted in metabolic dysfunction and immune evasion. ( One Day MD ) Immunometabolism is an emerging interdisciplinary field that explores the intricate relationship between metabolic processes and immune system activity, bridging the disciplines of immunology and metabolism. (1) At OneDayMD, we analyze cancer using a mechanistic, evidence-based, and clinically cautious approach, highlighting metabolic and immune pathways that influence tumor growth, progression, and response to therapy. Keywords: cancer m...

For decades, cancer research focused primarily on genetic mutations and uncontrolled cell growth. While these factors are important, modern oncology increasingly recognizes that tumors also manipulate metabolism to survive and evade the immune system. One of the most important metabolic features of many cancers is the production of large amounts of lactate , which accumulate in the tumor microenvironment. This phenomenon creates a powerful metabolic barrier that suppresses immune cells attempting to attack the tumor. Researchers sometimes describe this phenomenon as the “lactate shield.” In essence, cancer cells create a hostile metabolic environment that weakens immune defenses, allowing tumors to grow despite the presence of immune surveillance. Understanding this metabolic shield is now central to the rapidly growing field of cancer immunometabolism and may help explain why many cancers resist immunotherapy. Cancer Metabolism and the Warburg Effect The metabolic behavior of cance...

Some people may not realize this, but many people have cancer cells in their bodies without presenting much danger. Fortunately, there are some common foods that can cut off cancer cell’s nutrient supply and starve them to death. Autopsies of individuals who died of trauma often reveal microscopic colonies of cancer cells, also known as in situ tumors. Some people call them “disease-free cancers.” For instance, researchers  (NEJM) in Denmark performed autopsies on women aged 40 to 50, who never had cancer during their lifetime, and found that 39 percent of them had small cancerous lesions in their breasts. Only 1 percent of women in this age group would be diagnosed with breast cancer. Examination of some men in their 60s showed that 46 percent of them had histological evidence of prostate cancer, which is consistent with the findings of the autopsy study. However, the prevalence of prostate cancer in men aged 60 to 70 is actually around 1 percent. There is another example, whi...