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by Irwin Stone
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In the 1960s, a biochemist named Irwin Stone published a book that asked a deceptively simple question: why can most animals manufacture their own vitamin C, but humans cannot?
**Irwin Stone**
*Estimated Reading Time: 75 to 90 minutes*
Why humans cannot make their own vitamin C while most animals can. What a missing enzyme in our evolutionary past reveals about human nutrition. How one naval experiment in 1747 changed medicine forever, and why it took another forty-eight years for institutions to act on it. Why the question of dosage sits at the center of the vitamin C debate. How to separate promising hypotheses from proven treatments. And what Irwin Stone's radical proposal about ascorbic acid means for how we think about health, evolution, and the relationship between evidence and medical practice.
Readers interested in nutrition science and its history. Anyone curious about why vitamin C occupies such a contested place in medicine. People who want to understand how scientific hypotheses are formed, tested, and sometimes ignored. And anyone who has wondered whether the official recommended daily allowance of a nutrient tells the whole story.
In the 1960s, a biochemist named Irwin Stone published a book that asked a deceptively simple question: why can most animals manufacture their own vitamin C, but humans cannot? The answer, he argued, lies deep in our evolutionary past. Tens of millions of years ago, a mutation disabled a single enzyme in a primate ancestor. That enzyme, L-gulonolactone oxidase, performs the final step in a biochemical pathway that converts glucose into ascorbic acid. Most mammals possess it. Their livers churn out vitamin C continuously, adjusting production upward during stress, infection, and injury. Humans, along with a handful of other primates and a few other species, lost this ability. We must obtain vitamin C entirely from our diet. Stone found this fact remarkable, and he believed it had profound implications for human health that the medical establishment had failed to grasp. If other mammals produce the equivalent of several grams of vitamin C daily, and if they ramp up production dramatically when they are sick or stressed, then perhaps humans need far more vitamin C than the tiny amounts required to prevent scurvy. Perhaps, Stone argued, the official recommendations were calibrated to the wrong standard. They were designed to prevent a deficiency disease, not to support optimal function. This line of reasoning led Stone to propose a new concept he called hypoascorbemia: a condition of chronically low vitamin C intake that, while not producing the classic symptoms of scurvy, might nonetheless impair health and increase susceptibility to disease. He further argued that many modern illnesses, from colds to cancer to heart disease, might be connected to this widespread hidden deficiency. And he advocated for what he called megascorbic therapy: the use of vitamin C in doses far above conventional recommendations, both to prevent illness and to…
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Get the complete summary in the appHumans cannot make their own vitamin C; we must get it from food.
Scurvy is the severe form of vitamin C deficiency, but milder deficiency may also be harmful.
The conventional recommendation for vitamin C is based on preventing scurvy, not optimizing health.
Stone argued that humans may need much more vitamin C than conventional recommendations suggest.
The body's requirement for vitamin C increases during stress, infection, and injury.
High-dose vitamin C has been proposed as a treatment for many diseases, but the evidence is mixed.
"The Healing Factor - Vitamin C Against Disease" is a strong fit if you want practical ideas around science, health, medicine, especially themes like humans cannot make their own vitamin c; we must get it from food; scurvy is the severe form of vitamin c deficiency, but milder deficiency may also be harmful. The MinuteRead summary distills these concepts into a focused read, whether you're deciding whether to buy the book or applying its lessons at work.
Motivated to help readers with in the 1960s, Irwin Stone wrote “The Healing Factor - Vitamin C Against Disease” to package those ideas for a fast, focused read. In “The Healing Factor - Vitamin C Against Disease”, Irwin Stone focuses on in the 1960s. Through “The Healing Factor - Vitamin C Against Disease”, Irwin Stone distills the core ideas on science into lessons readers can absorb in a single short sitting. Readers turn to this work when they want Irwin Stone's perspective on the subject wit…
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