The study, published in the journal Cell, revealed that moderate doses of arginine—equivalent to a couple of over-the-counter tablets—reactivated proper MHC-1 protein production in mice. Supplemented mice not only formed fewer colon cancer tumors, but they also experienced less severe SARS-CoV-2 and influenza infections, even recovering faster when treated after contracting influenza. While the amino acid is widely available in food and supplements, researchers stress that human clinical trials are essential to verify these effects in people.
Key points
Moderate amounts of over-the-counter arginine can restore critical protein production nee…: Moderate amounts of over-the-counter arginine can restore critical protein production needed for natural immune surveillance in animal models.
Scientists suggest arginine could eventually be paired with existing cancer immunotherapi…: Scientists suggest arginine could eventually be paired with existing cancer immunotherapies or given to populations facing high viral risks.
Rigorous human clinical trials remain necessary to confirm whether the positive health ou…: Rigorous human clinical trials remain necessary to confirm whether the positive health outcomes observed in mice apply safely to humans.
Sources checked by our analysis pipeline: 1
- Date:
- November 15, 2026
- Source:
- Rockefeller University
- Summary:
- A surprising discovery from Rockefeller University suggests that a common amino acid could play a powerful role in protecting against cancer and viral infections. Scientists found that low arginine levels interfere with the immune system's ability to recognize dangerous cells, while increasing arginine intake reduced colon cancer tumors and improved viral infection outcomes in mice. Even more remarkably, giving mice arginine after they contracted influenza helped them recover.
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A common amino acid found in everyday foods could play a surprisingly important role in helping the immune system recognize cancer and fight viral infections. Scientists at Rockefeller University have discovered that when the body runs low on arginine, a key part of its immune defense system can stop working properly, potentially allowing dangerous cells and viruses to escape detection.
Arginine is an amino acid that the body produces naturally and also obtains from protein-rich foods. It is essential for making proteins that perform countless functions throughout the body. Researchers have long known that unusually low…
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