Linus Pauling, double Nobel Prize winner and vitamin C pioneer

Linus Pauling (1901–1994) remains one of the most brilliant and controversial scientists of the 20th century. A double Nobel Prize winner — Chemistry in 1954, Peace in 1962 — he devoted the last 25 years of his life to the therapeutic potential of vitamin C, publishing groundbreaking work that challenged traditional medicine.

1. Linus Pauling: a scientific genius

Before his vitamin C work, Pauling had already revolutionized science. His discoveries include:

  • The nature of the chemical bond — his 1939 book is still a reference today
  • The structure of proteins — he described alpha helices and beta sheets
  • Molecular biology — he coined the concept of "molecular disease" with sickle cell anemia
  • Quantum chemistry — fundamental contributions to atomic bonding theory

2. His vitamin C theory

In 1970, Pauling published Vitamin C and the Common Cold, which claimed that large doses of vitamin C (1-10g per day) could prevent and cure the common cold. This book sold millions of copies and sparked popular interest in vitamin supplements.

3. The mega-dose hypothesis

Pauling's central argument was based on evolutionary comparison:

  • Most animals synthesize their own vitamin C (rats produce ~70mg/kg/day)
  • Humans lost this ability ~40 million years ago due to a genetic mutation
  • Extrapolating from animals, the "optimal" human intake would be 2-10g per day — far above the official 110mg/day
💡 Pauling's personal practice: He took 12g of vitamin C per day for much of his adult life. He died at 93, living longer than most of his contemporaries.

4. Scientific controversy and criticism

The medical establishment was skeptical. Multiple clinical trials over the following decades showed mixed results:

  • The Cochrane Collaboration (2013) found that vitamin C reduces cold duration by ~8% in adults
  • No significant reduction in cold incidence in the general population
  • However, in people under extreme physical stress (athletes, soldiers), vitamin C reduced cold incidence by 50%

5. His later work: vitamin C and cancer

Together with Scottish physician Ewan Cameron, Pauling published data in 1976 suggesting that high-dose intravenous vitamin C could extend the lives of terminal cancer patients. Later Mayo Clinic trials using oral vitamin C found no benefit — a conflict partly attributed to the different bioavailability of IV vs. oral administration.

6. His legacy today

Modern research has vindicated several of Pauling's intuitions:

  • High-dose IV vitamin C is being studied in cancer clinical trials (National Cancer Institute)
  • Vitamin C is recognized for its role in immune function, collagen synthesis, and antioxidant protection
  • Orthomolecular medicine (the field Pauling founded) continues to explore optimal nutrient dosing
🏆 Key takeaway: While Pauling's most ambitious claims remain debated, his fundamental insight — that the RDA for vitamin C is far below optimal — has gained increasing scientific support over the decades.

FAQ

Partially yes. The 2013 Cochrane meta-analysis confirms that regular vitamin C supplementation reduces cold duration by 8% in adults and 14% in children, and halves cold incidence in people under extreme physical stress (athletes, soldiers in sub-arctic conditions). However, it does not significantly prevent colds in the general population — a nuance Pauling's original claims did not make.
Pauling progressively increased his intake to 12–18g per day for much of his adult life — well above the 1–2g he initially recommended to the public. He took his last doses in the days before his death at age 93 in 1994, having lived longer than most of his contemporaries and scientific critics.
Current research (NIH, NCI) suggests potential, particularly for intravenous high-dose vitamin C. Oral supplements cannot achieve the plasma concentrations needed for anti-tumour effects. IV vitamin C is being studied in clinical trials as an adjunct to chemotherapy, with promising results for quality of life and some survival outcomes in certain cancer types.
Pauling had already received the Nobel Prize in Chemistry (1954) and the Nobel Peace Prize (1962) — making him one of only four individuals to receive two Nobel Prizes. His vitamin C work, while controversial during his lifetime, has influenced modern research on orthomolecular medicine, and several of his core intuitions have since been validated by mainstream science.

Sources: Pauling L. (1970). Vitamin C and the Common Cold. W.H. Freeman. | Cameron E., Pauling L. (1976). PNAS. | NIH (2004). Ann Intern Med. | Hemilä H., Chalker E. (2013). Cochrane Database. | Linus Pauling Institute, Oregon State University.