Ascorbic acid (vitamin C)

synthetic

provenance:synthetic

first introduced:1928

regulatory status:supplement

context:Isolated by Albert Szent-Györgyi in 1928 (initially named 'hexuronic acid'), identified as vitamin C / L-ascorbic acid by Walter Haworth in 1933, and industrially synthesized at scale from 1934 by Hoffmann-La Roche using the Reichstein bulk-synthesis process (branded Redoxon) -- decades before Linus Pauling's 1970 megadose claims. Ascorbic acid is naturally present in citrus fruit and other produce; the tablets and powders sold since the 1930s, including those used in the megadose regimens this case documents, are manufactured synthetically rather than extracted from plants.

MECHANISM CLAIMED

At ordinary dietary levels, prevents scurvy. At the multi-gram 'megadose' levels Pauling promoted, claimed to prevent and shorten the common cold via enhanced immune function, and, at very high intravenous doses, to selectively damage cancer cells (via hydrogen-peroxide generation and effects on collagen/hyaluronidase) while sparing normal tissue, prolonging survival in terminal cancer.

MECHANISM ACTUAL

Ascorbic acid is an essential nutrient whose only well-established deficiency disease is scurvy. A 2013 Cochrane systematic review (Hemilä & Chalker) found regular megadose supplementation does not reduce common-cold incidence in the general population (pooled risk ratio 0.97, 95% CI 0.94-1.00), though it modestly shortens cold duration. Two Mayo Clinic randomized, double-blind, placebo-controlled trials (Creagan et al. 1979; Moertel et al. 1985) found no survival or symptom benefit from high-dose oral vitamin C in advanced-cancer patients. The National Cancer Institute's PDQ summary (last revised 28 May 2024) states the FDA has not approved high-dose vitamin C for any medical condition and that human evidence for an anti-cancer effect remains unestablished, even for the intravenous route, which does reach much higher plasma concentrations than oral dosing.

INTERVENTIONS USING IT

Megadose vitamin C ('orthomolecular' ascorbate therapy)

EXTERNAL REFERENCES

Wikipedia

NOTES

Vitamin C is a genuine essential nutrient whose only confirmed deficiency disease, scurvy, made it one of the first vitamins discovered and synthesized at industrial scale. The megadose claims this case documents — that gram-scale, far-above-dietary doses could prevent the common cold or cure cancer — are a distinct, later claim layered onto that real biochemistry, tested directly in randomized trials, and not supported by them.