Baking Soda Cures Cancer
Oral or intravenous sodium bicarbonate (baking soda) as a standalone cancer cure has no clinical evidence supporting it. While early-phase research explores sodium bicarbonate as an adjunct to conventional therapies, based on the observation that tumors create an acidic microenvironment, there is no evidence that consuming baking soda prevents or cures cancer in humans.
What we know
Cancer cells do produce lactic acid as a metabolic byproduct, creating an acidic tumor microenvironment (TME). Laboratory and animal studies have explored whether neutralizing this acidity with bicarbonate could inhibit tumor spread. Some mouse model experiments showed reduced metastasis when bicarbonate was added to drinking water. These findings are scientifically interesting but do not translate directly into a human cancer cure.
The body maintains blood pH in a very tight range (7.35-7.45) through the kidneys, lungs, and buffering systems. Consuming baking soda cannot meaningfully alter blood or tumor pH: the stomach rapidly neutralizes oral alkaline substances, and even if bicarbonate entered the bloodstream, the kidneys would quickly excrete the excess to restore equilibrium. The claim that 'cancer cannot survive in an alkaline environment' misrepresents in-vitro findings that have no equivalent in an intact human physiology.
A small number of retrospective clinical studies (primarily from a single center in Japan) have reported improved outcomes in certain cancers when alkalization therapy was combined with standard chemotherapy. These studies are small, non-randomized, and not replicated, and their authors themselves call for prospective randomized trials before drawing conclusions. Sodium bicarbonate has also been studied as a possible adjuvant to chemotherapy specifically within tumor tissue (via TACE procedures in liver cancer), where local pH effects are more plausible; even these results are preliminary.
The broader claim, promoted online and through figures such as Tullio Simoncini (who claims cancer is a fungus treatable with baking soda), is not supported by oncological evidence. Patients treated at Simoncini's facility have died from their cancers. Regulatory and cancer research bodies uniformly state that baking soda cannot prevent or cure cancer and that pursuing it in lieu of proven treatment poses serious risk.
Common claims
- Drinking baking soda alkalizes the body and kills cancer cells.False. The body tightly regulates blood pH regardless of what is consumed; baking soda is neutralized before reaching the bloodstream in meaningful amounts.
- Cancer is caused by acidic conditions, and baking soda reverses this.Oversimplified and false. Cancer causes local acidity as a metabolic effect; systemic body pH in healthy or sick people is not 'acidic', and systemic alkalization via oral baking soda is not physiologically achievable.
- Research shows baking soda reduces tumor metastasis.Partially true in animal models; not established in humans. Mouse studies showed reduced metastasis; human clinical trials with baking soda as a standalone treatment do not exist.
Evidence hierarchy
All sources
- Does Baking Soda Function as a Magic Bullet for Patients with Cancer? A Mini ReviewIntegrative Cancer Therapies / PMC · 2020
- Will cancer cells be defeated by sodium bicarbonate?Science China Life Sciences / PMC · 2017
- Clinical review of alkalization therapy in cancer treatmentFrontiers in Oncology · 2022
- Baking Soda for Cancer: Does It Work?Healthline · 2023