Baking Soda and Tumor pH: The Real Animal Research vs. the Convicted Fraud

NU ranks records over spin. This page is not medical advice — it's a map of what the primary literature actually says, with the evidence level marked on every claim. "Promising in a dish" is not "works in people," and we label which is which. Nothing here tells you to take, stop, or change any treatment, and it gives no doses or protocols. Talk to your doctor before acting on anything you read here, including this.

The honest headline

Two very different things share the words "baking soda" and "cancer," and conflating them is how people get hurt.

1. A legitimate research program on the acidic tumor microenvironment — how tumors acidify the tissue around them, and whether buffering that acid with bicarbonate changes how cancer spreads. This is real, peer-reviewed, long-running, and led by serious labs (Robert Gillies and colleagues at Moffitt Cancer Center). Evidence level: strong in cell culture and in mice; not established in humans.

1. A debunked fraud — Tullio Simoncini's claim that cancer "is a fungus" curable by infusing sodium bicarbonate. Evidence level: none. Simoncini lost his medical license and was criminally convicted in Italy, including in cases tied to patient deaths. These are not two sides of a debate. One is science in progress; the other is a discredited claim with a documented record of harm.

What the real research actually found

The basic biology is not controversial. Many tumors run a sugar-hungry metabolism (the Warburg effect) that releases acid (protons, lactate) into the surrounding tissue, lowering the local pH. That acidic microenvironment appears, in lab models, to help cancer cells invade, evade immune attack, and metastasize. As of mid-2026, EuropePMC returns roughly 8,200 papers for "sodium bicarbonate tumor pH metastasis" and about 69,700 for "bicarbonate cancer" — a large, active field, not a fringe one. (Live counts drift; these are order-of-magnitude.) Evidence level: well-established mechanism in lab models; its weight in human disease is still being worked out.

The headline animal finding, from the Gillies/Moffitt group, is that giving mice oral bicarbonate to buffer tumor acidity reduced the formation of spontaneous metastases in certain models — without shrinking the primary tumor. Their own later review names it plainly: "Back to basic: Trials and tribulations of alkalizing agents in cancer" (Gillies RJ, Ibrahim-Hashim A, Ordway B, Gatenby RA, 2022), alongside "Acidosis and cancer: from mechanism to neutralization" (Ibrahim-Hashim A, Estrella V, 2019). The word "tribulations" in a title from researchers central to this field is the tell. Evidence level: animal (mouse) models — real, reported by the originating lab, but mouse-to-human translation routinely fails.

Newer work keeps the thread alive and honest about difficulty. A 2026 EuropePMC result titled "Why Targeting Tumor Acidity Fails: Translational Barriers and Emerging Solutions" is a review about why this hasn't worked in patients yet. Others pair bicarbonate with immunotherapy — e.g., "Intratumoral bicarbonate functions as an adjuvant to potentiate PD-1 blockade in hepatocellular carcinoma" (2026) and "Transdermal bicarbonate buffer therapy increases intratumoral pH and elicits antitumor responses in bladder cancer" (2026). Evidence level: lab and animal, exploratory; "adjuvant to" a real drug, not a standalone cure. Read those titles carefully: the hypothesis under study is bicarbonate helping an existing therapy work better, not bicarbonate curing anything by itself.

The human evidence is thin — and that's the point

Search ClinicalTrials.gov for "sodium bicarbonate" tumor and you get about 77 registered studies (mid-2026); broader cancer-and-bicarbonate searches return a few hundred, but most are noise (mouthwash for radiation mucositis, contrast-dye kidney protection, unrelated drug codes that abbreviate to "SB"). The number of large, randomized, bicarbonate-versus-control trials showing a survival benefit in humans is, as far as the primary record shows, not there. Evidence level: limited / early human evidence — no demonstrated survival benefit.

Why so little human data on a cheap, century-old compound? This is NU's actual thesis, and it is not a conspiracy:

• Sodium bicarbonate is unpatentable. No company can own it, so no company can easily recoup the very large cost of a definitive Phase III trial. Unpatentable → under-funded → under-studied. That's an incentive-structure problem, full stop.
• It is not evidence of a hidden cure. "Under-studied" and "secretly suppressed miracle" are opposite claims. The honest reading is: we genuinely don't know how well it works in people because the money to find out hasn't materialized — and the early human signals so far are modest at best.

Anyone who tells you a cure is being hidden is selling you something. Anyone who tells you it's worthless and not worth studying is also overstating. The truth is duller and more useful: a real mechanism, real mouse data, and a funding gap.

The fraud, named clearly

Tullio Simoncini's thesis — "cancer is a fungus, bicarbonate is the antifungal cure" — has no support in the primary literature. We could find no peer-reviewed study that validates it; the handful of papers that mention his protocol by name discuss it as alternative-medicine misuse, not as a treatment that works. (Note: searching the bare surname "Simoncini" in a literature database returns well over a thousand results — it's a common Italian author name — so that raw count tells you nothing; what matters is that no paper supports the claim.) He was struck off the medical register and convicted of crimes including wrongful death linked to his treatments. Evidence level: zero, plus documented patient harm. Treating this as a "suppressed alternative" is itself the misinformation. It was tested by the legal and medical systems and it failed.

Safety — bicarbonate is not harmless

Even the legitimate researchers flag this. Oral sodium bicarbonate in the amounts used in animal studies is a serious sodium load and an alkali load. Documented risks of ingesting bicarbonate in quantity include:

• Metabolic alkalosis and dangerous electrolyte shifts (e.g., low potassium/chloride) — both well-represented in the case-report literature.
• Fluid overload and worsened high blood pressure / heart failure from the sodium — especially risky with kidney or heart disease.
• Stomach (gastric) rupture, reported in rare cases of large doses, particularly on a full stomach.
• Possible interactions with medications and with chemotherapies a patient may already be taking.

A viral claim sometimes attached to these protocols — that a specific multi-day water-fast-plus-bicarbonate regimen carries some dramatic mortality figure — we could not source to any primary study and are flagging as unverified. Do not treat unsourced percentages as fact. This page gives no doses, regimens, or protocols on purpose. Evidence level for self-dosing protocols: not established; potential for real harm.

Bottom line

• Real: tumors create an acidic microenvironment that appears to aid metastasis — well-established in the lab. (lab/in-vitro)
• Real but limited: buffering that acid with bicarbonate cut metastasis in mice in the originating lab's models. (animal)
• Unproven in people: no large randomized human trial shows bicarbonate extends survival; the field's own 2022/2026 reviews say translation is hard. (early/limited human)
• The interesting frontier is bicarbonate as a possible adjuvant to real immunotherapy/chemo — still exploratory. (lab/animal)
• The honest reason it's under-studied is that it's unpatentable and hard to fund — an incentive gap, not a hidden cure.
• Fraud: Simoncini's "cancer is a fungus" cure has zero scientific support and a record of criminal conviction and patient harm.
• Not harmless: sodium and alkali loads carry genuine risk; the scary viral mortality stat is unverified and is not repeated here as fact.

Bring this to your doctor as questions, not conclusions. Don't start, stop, or change any treatment based on this page.