Linus Pauling won two unshared Nobel Prizes and helped establish our modern understanding of the chemical bond. Late in his career, he became convinced that megadoses of vitamin C could treat cancer, a claim that made him, in the eyes of much of mainstream medicine, a cautionary tale. When he died of cancer himself at 93, it seemed to confirm the verdict: brilliance in one field doesn’t guarantee wisdom in another.
Fifty years later, the picture looks less clear-cut.
Where Pauling’s story went wrong
In the 1970s, Pauling teamed up with Scottish physician Ewan Cameron and gave terminally ill cancer patients very large doses of vitamin C, first intravenously, then as tablets. Compared with similar patients who didn’t receive it, their treated group reportedly lived longer and felt better, in some cases by several times.
Two subsequent Mayo Clinic trials tried to confirm this and found nothing: patients taking vitamin C tablets lived no longer than those who didn’t. For most oncologists, that settled the question, and Pauling’s crusade was filed away as a well-meaning mistake.
The detail everyone missed
Here’s the twist: Pauling and Cameron’s original patients received vitamin C by IV, while the Mayo Clinic trials tested tablets only, and that difference turns out to matter enormously. The gut can only absorb so much vitamin C; past a certain dose, swallowing more tablets barely raises blood levels at all. An intravenous drip bypasses that limit entirely, pushing blood concentrations tens or even hundreds of times higher than any pill could achieve.
This is a meaningful methodological gap, not evidence of a rigged trial. The Mayo researchers were testing a genuine question, does oral vitamin C help, and got a clear answer: no. What they weren’t testing was Pauling and Cameron’s actual protocol, which relied on much higher blood concentrations than any tablet can produce.
At those extreme concentrations, vitamin C stops behaving like a vitamin and starts behaving more like a drug. At ordinary levels it’s a straightforward antioxidant, neutralizing harmful molecules and protecting cells. But at very high levels, especially in and around tumors, it can flip roles and help generate hydrogen peroxide, a reactive compound that damages cells.
Cancer cells appear to be unusually vulnerable to this effect. They divide rapidly, often in poorly oxygenated tissue, already generate excess reactive molecules of their own, and have overstretched internal repair systems. A sudden pulse of hydrogen peroxide can be enough to push them over the edge, damaging their DNA and energy-producing machinery. Healthy cells, under less baseline stress, tend to tolerate it far better, making high-dose IV vitamin C, in effect, a weak but somewhat selective chemotherapy-like agent, achievable only at doses tablets simply can’t reach.
What the newer evidence actually shows
Human evidence remains early and mixed. Small trials have delivered high-dose IV vitamin C to patients with difficult cancers, ovarian, pancreatic, and brain tumors among them, generally finding it can be given repeatedly without serious side effects, though caution is warranted for anyone with poor kidney function or certain inherited conditions.
Some studies suggest pairing vitamin C infusions with chemotherapy may modestly extend survival or ease side effects; others show no benefit at all. The trials are still too small and inconsistent to draw firm conclusions. The one relatively consistent signal is quality of life, patients receiving vitamin C alongside chemotherapy often report less fatigue, pain, and nausea, which matters even short of a cure.
Laboratory work also points to subtler roles: vitamin C influences enzymes involved in how DNA is chemically marked and read, and in how cells respond to low oxygen, both relevant to cancer biology. Some experiments show high vitamin C levels making cancer cells less aggressive and more sensitive to treatment, and there are early hints it may help the immune system recognize tumors, though that remains speculative.
Partly right, not vindicated
So was Pauling right? The fairest reading sits between two extremes. He wasn’t vindicated: no trial has shown that IV vitamin C cures cancer, and his own case series with Cameron lacked the randomization needed to rule out bias. But he also wasn’t simply wrong: the Mayo trials tested a different intervention than the one he was proposing, so their negative result doesn’t close the book on the question he actually raised. The NCI itself now lists IV vitamin C as investigational rather than dismissing it outright, an accurate middle ground that got lost in decades of both sides overstating their case.
What’s still missing are large, definitive randomized trials proving that IV vitamin C meaningfully extends survival for most cancer patients. Until that evidence exists, it belongs in clinical trials and carefully supervised medical settings, not in wellness clinics selling it as an immune boost.
Original papers:
Cameron & Pauling (1976), “Supplemental ascorbate in the supportive treatment of cancer,” PNAS
Padayatty et al., “Vitamin C pharmacokinetics: implications for oral and intravenous use”
Source article: Stebbing, J., “Vitamin C and cancer: was Nobel laureate Linus Pauling on to something?”, The Conversation (2026)
August 11, 2026 at 10:23 pm
Re: “The detail everyone missed”
This is a totally false statement!
Pauling and Cameron recognized it immediately and wanted to alert the top medical journals about the rigged Mayo trial yet these corrupt journals all censored them!
Everyone should know that Pauling’s VALID work with high dose vitamin C supplementation (against the common cold and cancer) has been “falsified” by data distortions and lies, and he as a person (a double Nobel laureate) has been slandered as some deluded idiot by the criminal allopathic medical establishment and its countless quackwatch shills, lackeys, ignoramuses, and trolls for decades and it continues today — see https://www.rolf-hefti.com/vitamin-benefits.html (written by a published author of the Orthomolecular Medicine News organization)
But you can’t discredit the facts with lies. That only exposes and discredits the liars, and those individuals who mindlessly repeat and disseminate those lies (see link above).
“There are large numbers of scientists, doctors, and presstitutes who will sell out truth for money, such as those who describe people dropping dead on a daily basis [after getting a Covid-19 jab] as “rare” when it it happening all over the vaccinated world.” — Paul Craig Roberts, Ph.D., American economist & former US regime official, in 2024
“If we have learned anything in the past six years, it is that vaccinologists, doctors, and the government in general do not have good intentions and never did. The clear intention of everyone concerned was and is to make as much dirty money as possible, letting any amount of collateral damage slide, including a genocide and mass poisoning [with Covid-19 jabs]. The fact [is] that Big Pharma just murdered millions of people, with the full support of government, media, and “science”. With Covid, everyone is part of the fraud, many of them paid off, so no one has any reason to expose it, and big reasons to bury it. Don’t believe anything these people tell you, ABOUT ANYTHING. It isn’t time for a civil war against your neighbors, it is time for a revolution against these hoaxers and thieves.” — Miles Mathis, American author, in 2025
How do we get out of this propaganda world (and create justice, freedom and peace for all) — by learning what TRUE morality is —99% of people don’t know what it is because (1) it’s NOT taught in the official indoctrination system, better know as the “education system,” and (2) it’s NOT the same as religious morality: https://odysee.com/@woeih:e/Mark-Passio-Government-Is-Slavery:a
Because if you don’t know what TRUE morality is you will not stop doing, unwittingly or wittingly, evil things…
“The solution is NOT to create something new (eg, new systems of organization, new technologies, etc). The solution is to STOP being complicit with evil. To STOP doing things that are not moral for a reward. To STOP being complicit with anything the control system tells us we must do.” — Mark Passio, Spiritual Teacher
“As financial access, employment, and administration become conditional on algorithmic systems, freedom does not disappear through overt coercion, but through participation that is scored, filtered, and managed.” — Mark Keenan, Dec 2025 [https://www.globalresearch.ca/ai-operating-system-digital-totalitarianism/5909796]
August 12, 2026 at 6:08 am
Thank you for the detailed comment. You are right about one important point, and I think it deserves to be made more clearly in my article: the Mayo trials did not reproduce the Cameron–Pauling protocol in an important respect. Cameron and Pauling used vitamin C both intravenously and orally, whereas the Mayo trials used oral vitamin C alone. We now know that this distinction is pharmacologically significant because oral administration produces much lower plasma concentrations than intravenous administration. The NCI itself discusses this difference.
Where I would disagree is with the conclusion that this establishes that the Mayo trials were deliberately “rigged,” or that medical journals collectively censored Pauling and Cameron as part of a coordinated fraud. That is a much stronger historical claim, and it requires evidence beyond the fact that the trial protocols differed.
There is also an important distinction between saying that the Mayo trials failed to test the same intervention and saying that high-dose vitamin C has therefore been proven to treat cancer. The current evidence doesn’t justify either extreme. Modern research has revived serious interest in pharmacological-dose IV vitamin C, including studies investigating its possible role alongside conventional cancer treatment. But the evidence remains incomplete, and the NCI currently describes IV vitamin C as investigational rather than an established cancer treatment.
So I would actually revise the wording of my article to make this distinction clearer. Pauling’s hypothesis deserves to be evaluated on the evidence, not dismissed because some early trials were negative, but equally not declared proven because those trials were imperfect.
As for the material about COVID, governments, morality, “control systems,” etc., I don’t think it is useful to mix those claims into a discussion of the clinical evidence for vitamin C. My blog is about following the evidence wherever it leads, including when that evidence challenges the conventional interpretation.
If you have primary-source documentation showing that Pauling and Cameron specifically attempted to publish a critique of the Mayo trials and that journals deliberately suppressed it, I’d genuinely be interested in seeing it. That would be much more useful to the discussion than accusations of corruption.