Baking Soda: A Real Antacid and a Real Kidney Drug, Wrapped in Dangerous Myths

Summary

Baking soda (sodium bicarbonate) has two genuine, unglamorous uses — a fast, cheap antacid for the occasional bout of heartburn, and a real, physician-supervised role in slowing chronic-kidney-disease progression by correcting metabolic acidosis — but almost everything else sold under its name is wrong or lethal: you cannot "alkalize your body" (blood pH is homeostatically pinned near 7.4 and diet barely moves it), "baking soda cures cancer" is refuted quackery with a manslaughter conviction and documented deaths attached, over-ingestion causes severe metabolic alkalosis and even spontaneous g

Why Moderate

Moderate Evidence because the entry's verdict blends parts of very different strength. The debunks are the firm core: the "alkalize your body" refutation rests on settled acid-base physiology plus a systematic review (foundational), the antacid mechanism is undisputed chemistry (strong), and the acute-toxicity dangers are consistent, mechanistic and reproduced across case series (strong enough to state plainly). But the one therapeutic use with randomised evidence — oral bicarbonate for CKD metabolic acidosis — sits at Moderate precisely because its two pivotal trials conflict: a small, positive, open-label trial against a larger, negative, double-blind one with more adverse events. The overall entry inherits the confidence of that load-bearing therapeutic claim, which is Moderate.

NOT Foundational because there is no single undisputed axiom that carries the whole entry — it holds a live both-ways tension (real uses versus dangerous myths) and a genuinely conflicted therapeutic literature.

NOT Strong because the kidney use, the entry's most consequential therapeutic claim, is not settled: the trials disagree. Only the debunks and the pharmacology reach high confidence, and the entry marks those explicitly rather than letting them lift the therapeutic verdict.

The per-claim split (read this, not just the headline):
• "Alkalize your body" is false (blood pH fixed near 7.4): Strong / foundational (settled physiology + systematic review).
• Antacid mechanism (neutralises acid, occasional use): Strong (undisputed chemistry).
• Over-ingestion → metabolic alkalosis / gastric rupture: consistent case-series harm, stated as a real danger.
• "Baking soda cures cancer": refuted, lethal quackery — not an evidence tier.
• CKD metabolic-acidosis correction: Moderate (one positive open-label RCT vs one negative double-blind RCT).

Practical takeaway

The framing to hold: baking soda has two narrow, real uses and a cloud of dangerous myths. Use it as an occasional antacid if you like; leave the kidney use to a clinician; and treat "alkalize / detox / cure" claims as marketing at best and lethal at worst.

The two genuine uses (and their limits).
• Occasional antacid: a small dose in water can relieve an occasional bout of heartburn or indigestion within minutes. Keep it occasional. It is a sodium salt (~270 mg sodium per gram), so it is not for daily use, and frequent or persistent reflux needs proper assessment rather than habitual self-dosing (see gerd_diagnostic_lifestyle).
• CKD metabolic acidosis — clinician-directed only: if you have chronic kidney disease and your blood tests show a low serum bicarbonate, your nephrologist may prescribe oral bicarbonate to correct it. This is a monitored, dose-adjusted medical treatment for a measured deficit — not something to start, stop or dose yourself, and not a general "kidney tonic."

Do not use it for the myth reasons.
• "Alkalizing" or "detoxing": skip it entirely. You cannot meaningfully change your blood pH by diet or bicarbonate; you only change your urine. There is no health benefit to chase here (see detox_cleanse_claims).
• Cancer: never. "Baking soda cures cancer" is refuted quackery with deaths and a manslaughter conviction attached. If you or someone you know is being steered toward it in place of real treatment, that is a red flag to get to a qualified oncology team, not a therapy to try.

If you use the antacid, use it safely.
• Small dose, occasional only — follow the OTC label; never take large amounts, and never "top up" repeatedly.
• Watch the sodium — if you have high blood pressure, heart failure or kidney disease, even the antacid dose matters; check with a clinician before using it at all (see cardiovascular_health_management).
• Seek urgent care after any large ingestion — severe metabolic alkalosis, dangerous electrolyte shifts and (rarely) stomach rupture are real acute emergencies.

For athletic performance: this is a different question with different evidence and dosing — see sodium_bicarbonate_supplementation. Do not carry the antacid habit into performance dosing.

Evidence detail

Why This Entry Exists

Baking soda is the textbook case of a cheap household compound that is simultaneously a legitimate remedy and a magnet for pseudoscience. The two genuine uses are real and evidence-backed: it neutralises stomach acid within minutes, and in a specific kidney-disease population it can slow decline by correcting the acid build-up that damages the kidney. But the same white powder gets sold as a systemic "alkalize and detox" cure, and at the extreme as a cancer treatment — and those claims are not merely weak, they are physiologically impossible and, in the cancer case, fatal. So the entry has to hold two opposite jobs at once: protect the small real uses from a lazy "it's just a folk remedy" dismissal, and dismantle the "alkalize your body / cure disease" story that trades on the same name.

The failure modes run in both directions, and one of them can kill. Over-claim baking soda as a systemic alkalizer or a cancer cure and a person forgoes real medicine, over-ingests, and lands in the emergency department with metabolic alkalosis, a ruptured stomach, or a delayed cancer diagnosis. Dismiss it entirely and you miss that it is a real antacid and that oral bicarbonate has a genuine, guideline-relevant place in managing kidney-disease acidosis under a clinician. The whole point of the entry is to get that ordering right: two narrow real uses stated plainly, the "alkalize" premise debunked from settled physiology, the cancer claim named for what it is (refuted, lethal quackery), and the acute-ingestion and sodium dangers made explicit so nobody self-doses.

What bad advice this protects against, in all directions:
• "Baking soda alkalizes your body and detoxes you" → physiologically false. Blood pH is held near 7.35–7.45 by the kidneys and lungs; a deliberate diet change moves blood pH by around a hundredth of a unit while shifting urine pH by a full point. You change your urine, not your blood — the "alkalize your body" premise is wrong at the level of basic acid-base physiology (see detox_cleanse_claims).
• "Baking soda cures cancer" → refuted, dangerous quackery. This is the Tullio Simoncini "cancer is a fungus" theory; there is zero supporting evidence, Simoncini was struck off and later convicted of manslaughter over a cancer patient's death, and other deaths are on record. It is not a contested claim to weigh — it is documented lethal harm and a reason to seek real oncology care.
• "It's a natural remedy, so more is safer" → the opposite. Acute over-ingestion causes severe metabolic alkalosis, dangerous electrolyte shifts, seizures and heart-rhythm disturbances, and — swallowed in bulk on a full stomach — can rupture the stomach, which carries high mortality.
• "It's just harmless kitchen powder" → it is a sodium salt. Roughly a gram of baking soda carries about 270 mg of sodium, so a heavy or habitual dose is a real problem for anyone with high blood pressure, heart failure or kidney disease (see cardiovascular_health_management).
• "Baking soda fixes my reflux, I'll take it every day" → it is an antacid for the occasional bout only. Chronic or frequent heartburn needs proper assessment and treatment, not daily self-dosed bicarbonate with its sodium load (see gerd_diagnostic_lifestyle).
• "Bicarbonate can't help the kidneys — that's just more alkaline nonsense" → the reverse over-correction. In chronic kidney disease with metabolic acidosis, physician-prescribed oral bicarbonate to lift serum bicarbonate is a real, evidence-based intervention — distinct from the "alkalize your body" myth, and not a self-directed one.
• "Use it for athletic performance" → out of scope here; the ergogenic/sports-buffering use is a different topic with different evidence and dosing (defer to sodium_bicarbonate_supplementation).

This entry owns the consumer and health-claim verdict on baking soda — the two genuine uses (occasional antacid; physician-supervised bicarbonate for CKD metabolic acidosis) and the debunks/dangers (the false alkalize claim, the lethal cancer quackery, the metabolic-alkalosis and gastric-rupture toxicity, and the sodium caveat). It explicitly defers the ergogenic/performance use to sodium_bicarbonate_supplementation and routes actual cardiovascular and reflux management to their owning entries rather than re-arguing them.

Evidence

Organised by claim, with the tier signal inline. The debunks are the firmest parts of the entry — settled physiology and documented case-law. The one genuine therapeutic use with trial evidence (kidney disease) is exactly where the trials disagree, which is what holds the whole entry at Moderate.

The genuine antacid use is undisputed (Strong pharmacology).

1. Baking soda is a real, fast-acting antacid — appropriate only for occasional heartburn. Sodium bicarbonate reacts directly with stomach hydrochloric acid to neutralise it within minutes, which is why it is a long-standing over-the-counter antacid. The catch is that it is a sodium salt — roughly 1 g of sodium bicarbonate carries about 270 mg of sodium — so it is unsuitable for chronic or frequent use and carries a real sodium caveat for people with hypertension, heart failure or kidney disease. (Standard pharmacology / OTC antacid monographs; sodium content is basic stoichiometry (sodium is ~27% of sodium bicarbonate by mass), and the hypertension caution is echoed in the toxicity literature's hypernatremia cases. Strong for the mechanism — acid neutralisation is undisputed chemistry; the "occasional only" and sodium caveats are well-established. Generic and unbranded — no marketing machine behind this use.)

The kidney-disease use is real but the pivotal trials conflict (Solid signal, contradicted).

2. In advanced CKD with metabolic acidosis, oral bicarbonate slowed kidney decline in one open-label trial — the genuine clinical use. In patients with CKD stage 4 (creatinine clearance 15–30) and low serum bicarbonate (16–20 mEq/L), oral sodium bicarbonate dosed to keep serum bicarbonate at or above 23 mEq/L (average about 1.82 g/day) slowed the fall in kidney function and reduced progression to dialysis over two years, versus standard care. This is the mechanistic and clinical anchor of the legitimate kidney use: correcting the acid, not "alkalizing the body." (de Brito-Ashurst I, Varagunam M, Raftery MJ, Yaqoob MM. "Bicarbonate Supplementation Slows Progression of CKD and Improves Nutritional Status." J Am Soc Nephrol 2009;20(9):2075–84, PMID 19608703. Open-label (unblinded), single-centre RCT, n=134. Moderate-to-Emerging on its own — a real signal, but small and unblinded. Investigator/academic-funded; no commercial bicarbonate maker profits from a generic pennies-a-dose salt, so cui bono here cuts, if anything, toward under-promotion rather than hype.)

3. A larger, double-blind trial found no benefit — and more harm — tempering the kidney claim. A pragmatic, double-blind, placebo-controlled, multicentre RCT of oral sodium bicarbonate in older patients (aged 60 and over) with advanced CKD and low serum bicarbonate found no improvement in physical function, quality of life, or the rate of kidney decline, and recorded more adverse events on bicarbonate than placebo. This is the higher-quality design, in a different (older) population, and it disagrees with the earlier positive trial — which is precisely why the kidney use is presented as physician-supervised and acidosis-specific, not a general kidney tonic. (Witham MD, et al. "Clinical and cost-effectiveness of oral sodium bicarbonate therapy for older patients with chronic kidney disease and low-grade acidosis (BiCARB): a pragmatic randomised, double-blind, placebo-controlled trial." BMC Medicine 2020;18:91, PMID 32268897; NIHR HTA programme. Higher-quality design than the 2009 trial — double-blind, placebo-controlled, multicentre — but a different, older population. Moderate. UK NIHR (public) funded, no product-sales incentive; a clean negative trial with low publication-bias risk.)

The "alkalize your body" claim is physiologically false (Strong / foundational debunk).

4. You cannot meaningfully change blood pH by diet or bicarbonate — you change urine pH. In a controlled dietary study, a deliberate change in dietary acid load moved systemic (blood) pH by only about 0.014 units while shifting urine pH by about 1.02 units — diet and bicarbonate move the urine, not the blood, because the kidneys and lungs buffer arterial pH tightly around 7.4. A systematic review of dietary acid load, alkaline water and cancer concluded that promoting an alkaline diet or alkaline water to prevent or treat cancer "is not justified." The entire "alkalize your body" premise contradicts settled acid-base homeostasis. (Fenton TR, Huang T. "Systematic review of the association between dietary acid load, alkaline water and cancer." BMJ Open 2016;6:e010438, PMID 27297008. Strong / foundational — settled physiology plus a systematic review; this debunk is not in scientific dispute. Non-commercial/academic. Cui bono runs the other way here: the alkaline-water and alkaline-diet product industry profits from the very claim the evidence refutes.)

The "baking soda cures cancer" claim is refuted, lethal quackery (not an evidence tier — documented harm).

5. "Baking soda cures cancer" is dangerous pseudoscience with documented deaths, not a contested claim. The claim originates with Tullio Simoncini's theory that cancer is caused by a Candida fungus treatable with sodium bicarbonate (oral and intravenous). It has no supporting evidence and contradicts basic oncology. Simoncini was struck off the medical register in Italy (2003), convicted of fraud and manslaughter (2006), and separately sentenced to five years for the culpable manslaughter of a cancer patient (2018). Documented harms include a fatal bowel perforation and a death recorded as metabolic alkalosis in a patient treated with this approach. This is the single most dangerous claim in the topic: patients who believe it forgo real treatment. It must be read as documented lethal harm and a reason to seek real oncology care — never framed as "emerging" or "contested." (Barrett S, Quackwatch, "Be Wary of Simoncini Cancer Therapy"; case summaries via Psiram/Wikipedia; Italian court convictions 2006 and 2018. Not an evidence tier — refuted-and-lethal quackery. Classic cui bono: cash-pay alternative-cancer clinics profit directly from desperate patients, the financial motive behind the deadliest claim.)

Acute over-ingestion is genuinely dangerous (Consistent case-series harm).

6. Swallowing too much baking soda causes severe metabolic alkalosis and can rupture the stomach. Acute over-ingestion produces severe metabolic alkalosis (reported blood pH as high as 7.54 with serum bicarbonate around 54 mmol/L), high blood sodium, low potassium, and can trigger seizures and dangerous heart-rhythm disturbances. With acute, massive ingestion on a full stomach, the carbon-dioxide generated as bicarbonate meets stomach acid can cause spontaneous gastric rupture — a surgical emergency with high mortality. A systematic review catalogued dozens of severe-toxicity cases. This is the concrete danger behind "natural remedy, so more is safer." (Case report of spontaneous gastric rupture after sodium bicarbonate ingestion, J Emerg Med; "Metabolic alkalosis: an adverse effect of baking soda misuse," Exp Ther Med 2022, PMC9475337; systematic review of severe sodium-bicarbonate toxicity cases, Am J Emerg Med. Case-report / case-series level for the harm — but consistent, mechanistic, and reproduced; strong enough to state plainly as a real danger. No industry angle; harms arise from self-directed "natural remedy", pica, detox-cleanse and drug-test-masking misuse — reinforcing the detox_cleanse_claims link.)

Mechanism

This entry owns only enough acid-base mechanism to make the two real uses and the two debunks intelligible; it does not re-argue general detox physiology (deferred to detox_cleanse_claims) or full cardiovascular management (cardiovascular_health_management).

Why it works as an antacid. Sodium bicarbonate is a weak base. Swallowed, it reacts with the hydrochloric acid in the stomach, neutralising acid and producing water, salt and carbon dioxide. That reaction is fast, which is why symptomatic relief comes within minutes. It is also why the mechanism is self-limiting and unsuitable for repeated use: the carbon dioxide produced causes belching, the sodium load accumulates, and the acid rebound and electrolyte cost make it an occasional tool, not a daily one.

Why the "alkalize your body" claim is biochemically impossible. Arterial blood pH is one of the body's most tightly defended variables, held near 7.4 by two buffering systems working continuously: the lungs adjust carbon-dioxide clearance breath by breath, and the kidneys excrete or retain acid and bicarbonate. When you swallow a base, the body's response is to excrete the excess — which is why diet and bicarbonate visibly change urine pH (the excretion channel) while barely touching blood pH (the defended variable). "It made my urine alkaline" is the system working as designed, not evidence that your blood or tissues have been "alkalized." A blood pH genuinely pushed to the numbers "alkalize" marketing implies would be a life-threatening metabolic alkalosis, not a wellness state.

Why the kidney use is real and is not the same thing. In advanced chronic kidney disease the kidneys lose their capacity to excrete the daily acid load, so acid accumulates — metabolic acidosis, marked by a low serum bicarbonate. That chronic acid state is itself thought to accelerate kidney damage and drive muscle and bone breakdown. Giving oral bicarbonate here is targeted repletion: it lifts a measured, pathologically low serum bicarbonate back toward normal in a monitored patient. That is a specific correction of a measured deficit under medical supervision — the mechanistic opposite of a healthy person swallowing baking soda to "alkalize" a blood pH that is already normal. The trials disagree on how much clinical benefit that correction delivers, which is why the use is real but hedged.

Why over-ingestion ruptures the stomach. The same neutralisation reaction that makes baking soda a fast antacid generates carbon-dioxide gas. A normal antacid dose produces a manageable amount. A massive dose swallowed quickly on a full stomach can generate gas faster than it can escape, distending the stomach until it tears — a rare but well-described mechanism behind spontaneous gastric rupture, distinct from and additional to the systemic metabolic-alkalosis danger.

Risks And Contraindications

• "Baking soda cures cancer" is lethal quackery — name it as such. This is the load-bearing safety item. The Simoncini "cancer is a fungus" claim has no evidence, contradicts oncology, and is attached to documented deaths and a manslaughter conviction. The danger is twofold: direct harm from intravenous/oral bicarbonate misuse, and — often worse — patients forgoing effective cancer treatment. Anyone considering baking soda as a cancer therapy should be routed firmly to real oncology care. This is never to be softened into "contested" or "emerging."
• Acute over-ingestion is a medical emergency. Large doses cause severe metabolic alkalosis (with reported blood pH up to ~7.54), high sodium, low potassium, seizures and heart-rhythm disturbances; a massive dose on a full stomach can rupture the stomach, which carries high mortality. Never take large amounts, and seek urgent care after any significant over-ingestion.
• The sodium load is a real hazard for specific groups. At roughly 270 mg of sodium per gram, baking soda is a meaningful sodium source. People with hypertension, heart failure, or kidney disease should not use it — even as an antacid — without clinician guidance (see cardiovascular_health_management).
• Not for chronic or frequent use. As an antacid it is for occasional heartburn only. Regular use means an accumulating sodium load, acid rebound, and — critically — a masked symptom: persistent reflux needs assessment, not daily bicarbonate (see gerd_diagnostic_lifestyle).
• The kidney use is prescription-supervised, not self-directed. Oral bicarbonate for CKD acidosis is dosed to a blood target and monitored; the trials conflict on benefit, and the larger, better-blinded trial recorded more adverse events. It is not a general kidney tonic and must not be self-started.
• Do not over-correct into "it's useless." The reverse error is also wrong: baking soda is a genuine antacid and physician-supervised bicarbonate has a real role in kidney-disease acidosis. The honest message is "two narrow real uses, dangerous myths around them," not blanket dismissal.

Controversy

Nature: a cheap household compound with two legitimate, unglamorous uses wrapped in a cloud of systemic health claims that range from physiologically impossible to lethal — so error is possible at both poles: dismissing the real antacid and kidney-acidosis uses on one side, and endorsing the "alkalize / detox / cure" myths on the other. Unusually for a both-ways entry, one pole is not merely wrong but fatal.

Position A — "Baking soda has genuine, evidenced uses." The defended-uses take.
• Best evidence: it neutralises stomach acid within minutes (undisputed chemistry, a real occasional antacid), and oral bicarbonate to correct metabolic acidosis slowed kidney decline in an open-label CKD trial. Both are real within narrow bounds.
• Where it goes wrong if overstated: it slides into "take it daily for reflux," treats the single positive kidney trial as settled, or lets the legitimate acidosis correction bleed into the illegitimate "alkalize your body" story.

Position B — "The popular claims are false or dangerous." The debunk take.
• Best evidence: blood pH is homeostatically fixed near 7.4 and diet moves it by about a hundredth of a unit (you change urine, not blood); the alkaline-diet-for-cancer premise is "not justified" per systematic review; the cancer-cure claim is refuted quackery with deaths and a manslaughter conviction; and over-ingestion causes metabolic alkalosis and gastric rupture.
• Where it goes wrong if overstated: it can tip into "baking soda is worthless and only harmful," which ignores the real antacid and the genuine, physician-supervised kidney-acidosis use.

The funding/bias dimension — cui bono, both ways. The claims with sellers behind them are the false ones. The alkaline-water and alkaline-diet product and supplement industry profits directly from the "alkalize your body" story that the evidence refutes; cash-pay alternative-cancer clinics profit from the deadliest claim, since patients pay and forgo real treatment. The genuine uses, by contrast, have almost no commercial champion — baking soda is a generic, pennies-a-dose salt that nobody markets, so if anything it is under-promoted. The one countervailing incentive runs the other way: makers of patented alkali therapeutics for kidney-disease acidosis (for example proton-binding polymers such as veverimer) have a mild interest in positioning against cheap bicarbonate. Notably, the strongest debunk (Fenton, BMJ Open) and the tempering negative kidney trial (BiCARB) are both non-commercial, publicly funded work — which raises confidence in them (see cui_bono_industry_funding_bias).

Realised Position: Both halves are true and non-contradictory. The genuine uses are narrow and real — an occasional antacid, and physician-supervised bicarbonate for CKD metabolic acidosis — and the popular systemic "alkalize / detox / cure" framing is physiologically false and, in the cancer case, fatal. We hold the topic at Moderate: the debunks are strong to foundational, but the one therapeutic use with trial evidence has two pivotal RCTs that conflict, so the kidney benefit is real-but-hedged rather than settled. The "alkalize your body" and "baking soda cures cancer" claims are not weighed as contested positions — they are refuted, and in the cancer case documented as lethal. The ergogenic/performance use is a separate question owned by sodium_bicarbonate_supplementation.

Cross-Pillar Connections

Baking soda is a diet/supplement topic with a genuine clinical tail into kidney and cardiovascular medicine and a large debunk surface into the detox and pseudoscience lines.
• Supplements (sodium_bicarbonate_supplementation): owns the ergogenic/sports-buffering use of the same compound — different evidence, different dosing. This entry holds the consumer/health-claim side and defers performance dosing there.
• Foundations / Debunks (detox_cleanse_claims): owns the general "detox your body" physiology; this entry holds only the baking-soda-specific "alkalize your body" refutation and routes the broader detox debunk there.
• Conditions (gerd_diagnostic_lifestyle): owns the assessment and management of reflux; this entry holds only that baking soda is an occasional antacid, not a daily reflux treatment, and hands off persistent reflux there.
• Conditions (cardiovascular_health_management): owns hypertension and heart-failure management, where the sodium load matters most; this entry holds only the sodium caveat and defers management there.
• Foundations (publication_bias_and_evidence_distortion): the mechanism behind selective citation of the positive kidney trial and the marketing amplification of the alkalize claim.
• Foundations (cui_bono_industry_funding_bias): the both-ways funding logic — myths with sellers, truths without — that this entry's bias analysis rests on.

What would change our mind

Industry bias note

Sources (7)

• Standard pharmacology / OTC antacid monographs. (Generic/unbranded; no seller interest.) — sodium bicarbonate neutralises gastric acid within minutes; appropriate for occasional heartburn only; ~270 mg sodium per gram (sodium is ~27% of NaHCO₃ by mass), hence the hypertension/heart-failure/kidney caution.↗
• de Brito-Ashurst I, Varagunam M, Raftery MJ, Yaqoob MM. (2009). "Bicarbonate Supplementation Slows Progression of CKD and Improves Nutritional Status." J Am Soc Nephrol 20(9):2075–84, pubmed.ncbi.nlm.nih.gov/19608703↗/" target="_blank" rel="noopener">PMID 19608703↗. (Investigator/academic-funded; open-label, single-centre, n=134.) — oral bicarbonate (avg ~1.82 g/day) to keep serum bicarbonate ≥23 mEq/L slowed GFR decline and reduced progression to dialysis over 2 years in CKD stage 4 with metabolic acidosis.
• Witham MD, et al. (2020). "BiCARB: oral sodium bicarbonate for older patients with CKD and low-grade acidosis — a pragmatic, double-blind, placebo-controlled RCT." BMC Medicine 18:91, pubmed.ncbi.nlm.nih.gov/32268897↗/" target="_blank" rel="noopener">PMID 32268897↗; NIHR HTA programme. (Public/NIHR-funded; higher-quality design, negative result.) — no improvement in physical function, quality of life, or renal decline; more adverse events than placebo, in patients aged ≥60. Conflicts with the 2009 positive trial.
• Fenton TR, Huang T. (2016). "Systematic review of the association between dietary acid load, alkaline water and cancer." BMJ Open 6:e010438, pubmed.ncbi.nlm.nih.gov/27297008↗/" target="_blank" rel="noopener">PMID 27297008↗. (Non-commercial/academic; the alkaline-product industry profits from the claim this refutes.) — dietary acid-load change moved blood pH ~0.014 units vs urine pH ~1.02 units; promoting alkaline diet/water for cancer "is not justified."
• Barrett S. Quackwatch, "Be Wary of Simoncini Cancer Therapy"; case summaries via Psiram/Wikipedia; Italian court convictions 2006 and 2018. (Watchdog/court record; cash-pay alt-cancer clinics profit from the claim.) — "cancer is a fungus / baking soda cures it" has zero evidence; Simoncini struck off (2003), convicted of fraud and manslaughter (2006), sentenced to 5 years for culpable manslaughter of a cancer patient (2018); documented deaths including bowel perforation and a metabolic-alkalosis death.↗
• "Metabolic alkalosis: an adverse effect of baking soda misuse." Exp Ther Med (2022), PMC9475337; with a case report of spontaneous gastric rupture after sodium bicarbonate ingestion (J Emerg Med) and a systematic review of severe sodium-bicarbonate toxicity cases (Am J Emerg Med). (Academic case reports/series; no industry angle — harms from self-directed misuse.) — acute over-ingestion → severe metabolic alkalosis (pH up to ~7.54, HCO₃⁻ ~54 mmol/L), hypernatremia, hypokalemia, seizures, dysrhythmias; massive ingestion on a full stomach → spontaneous gastric rupture (high mortality).↗
• Funding notation: the load-bearing debunks (the "alkalize your body" refutation from Fenton and the tempering negative kidney trial BiCARB) are both non-commercial, publicly funded work with no seller interest — which is why they are trustworthy. The commercially motivated claims run the other way: the alkaline-product industry profits from the refuted "alkalize" story, and cash-pay clinics profit from the lethal cancer claim. The genuine uses (antacid; CKD-acidosis correction) have no marketing champion — a generic, off-patent salt — so they are, if anything, under-promoted. The bias vector runs toward selling the myths.*↗

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