It's from the Corona virus;
RP (6:15): Uh yeah, the workers at North Carolina in the Virus department (*)published several papers, a long series, about 10 years ago, about how you can remove the nucleic acid section that describes specifically the protein that allows the virus to attach to human cell surfaces, so that if you inject that into an animal virus you can make it stick to certain receptor on human cells. The current Corona viruses contain this adhesive protein, which in the process of making the virus stick to the surface of our cells, inactivates the protein that it sticks too and that protein, the ACE-2 enzyme, angiotensin converting enzyme number 2, happens to be the degrading proteolytic enzyme that breaks down angiotensin to which is the promoter of high blood pressure, inflammation, degeneration, and all kinds of bad things in our body. And so ACE, the Angiotenin converting enzyme, they found that if you block that, or if you block the actions of the angiotensin 2, the short peptide, that you can relieve high blood pressure and at the same time it happens to relieve nerve degeneration.
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Ray Peat Interview - April 2021 - One Radio Network