Vitamin C: Appreciation for a Quiet Giant of Nutritional Science (May 20, Vitamin C day!)
The First Controlled Nutritional Experiment (1747)
One of the most important milestones in nutritional science occurred on May 1747, when Scottish naval surgeon James Lind conducted what is widely considered the first controlled clinical trial aboard HMS Salisbury.
Lind selected 12 sailors suffering from scurvy and divided them into groups receiving different dietary treatments. The group given citrus fruits—lemons and oranges—showed the most dramatic recovery.
This experiment did not identify vitamin C itself, but it clearly demonstrated that a dietary component in citrus fruits could prevent and treat scurvy. It became a foundational moment in the history of evidence-based medicine.
From “Vitamine” to Vitamin C
The word vitamine was first coined in 1912 by Polish biochemist Casimir Funk, combining “vital” and “amine,” under the (later incorrect) assumption that all such nutrients were amines.
Vitamin C itself—ascorbic acid—was not isolated until 1932, when Albert Szent-Györgyi, working with Joseph Svirbely and others, identified and characterized it as the antiscorbutic factor responsible for preventing scurvy.
Szent-Györgyi’s work earned him the Nobel Prize in Physiology or Medicine in 1937.
Sailors, Citrus, and the “Limey” Nickname
British naval use of citrus juice led to the famous nickname “limeys,” referring to sailors consuming lime juice to prevent scurvy.
While effective, lime juice was actually less potent in vitamin C than lemons or oranges, but still sufficient to significantly reduce scurvy risk on long voyages. It is also one of the main reasons we still use lemon on fish to this day!
Ya scurvy naves!
What Vitamin C Actually Does
Vitamin C (ascorbic acid) is a water-soluble vitamin, meaning it is not stored in large quantities in the body and excess amounts are generally excreted through urine and through the bowel.
It plays essential roles in:
Collagen synthesis (connective tissue, skin, blood vessels)
Immune system function
Antioxidant activity (neutralizing reactive oxygen species)
Iron absorption (non-heme iron from plant foods)
Wound healing and tissue repair
Because it is water-soluble, regular intake is required through diet or supplementation. We cannot make it ourselves so we have to get it by eating. Weird fact, cats make their own!
Dietary Requirements and Supplementation
According to the U.S. National Institutes of Health (NIH):
Recommended Dietary Allowance (RDA):
Men: ~90 mg/day
Women: ~75 mg/day
Smokers require an additional ~35 mg/day due to increased oxidative stress.
These amounts are typically met through a diet including fruits and vegetables such as citrus, bell peppers, strawberries, and leafy greens.
High-Dose Vitamin C and “Cleanses”
High-dose vitamin C supplementation has been explored in various contexts, most famously by Linus Pauling, who advocated gram-level doses for immune support and other health claims.
Some supplementation protocols include so-called “vitamin C flushes,” where doses are gradually increased until gastrointestinal tolerance is reached. This is based on vitamin C’s limited intestinal absorption and osmotic effects at high doses.
However, from a physiological standpoint:
Excess vitamin C is not “stored” long-term in the body
High doses can lead to:
Diarrhea (osmotic effect in the gut)
Abdominal cramping
Nausea
Very high chronic intake may increase risk of:
Kidney stones (oxalate formation in susceptible individuals)
Possible gastrointestinal irritation
While short-term high dosing is sometimes used in alternative health settings, strong clinical evidence for “detoxification” effects is limited. However, empirical evidence and pure experience show me it really works. I will get into the term 'detoxification' another time.
Linus Pauling and the Vitamin C Debate
Linus Pauling, a two-time Nobel laureate, became one of the most influential advocates for high-dose vitamin C. He proposed its use for colds, cancer adjunct therapy, and general health optimization.
While his enthusiasm significantly increased public interest in supplementation, later clinical trials produced mixed or inconclusive results for many of his more expansive claims.
Today, vitamin C is recognized as essential for health—but not as a cure-all. (which nothing is...)
A Balanced Perspective
Vitamin C is a miracle molecule and certainly not a trivial nutrient. It is a foundational biochemical requirement for human life, particularly important for connective tissue integrity and immune function.
Its story is powerful because it illustrates something rare in medicine:
a simple dietary deficiency led to one of the earliest controlled clinical experiments, which eventually helped define the entire field of nutritional science. Also rare in medicine, the acceptance and understanding of most nutritional supplemements. That agian, is another conversation!
Closing Reflection
Vitamin C deserves its reputation—not only as a dramatic “detox agent,” but as a quiet, essential participant in the daily maintenance of human biology. It is a reminder that sometimes the most important compounds are also the most ordinary.
References
Lind, J. (1753). A Treatise of the Scurvy.
Szent-Györgyi, A. (1937). Nobel Prize in Physiology or Medicine. NobelPrize.org
Funk, C. (1912). “The etiology of the deficiency diseases.”
NIH Office of Dietary Supplements. Vitamin C Fact Sheet for Health Professionals (updated regularly). https://ods.od.nih.gov/factsheets/VitaminC-HealthProfessional/
Linus Pauling Institute, Oregon State University. Vitamin C Information Center. https://lpi.oregonstate.edu/mic/vitamins/vitamin-C
