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Some antibiotics, like chloramphenicol, can mess with B12 metabolism

Glutathione and cold sores Cold sores are primarily caused by HSV-1, a virus that induces oxidative stress upon infection and generates ROS, which can damage cellular components and exacerbate the inflammatory response

For example, when combined with glycine (as in GlyNAC), glutathione levels rose up and oxidative stress markers dropped by 73% over 1624 weeks (NIH)

doi: 10.1210/en.2014-1671 92 LeWWBerghornKARassnickSHoffmanGE

Cisterna B, Costanzo M, Nodari A, Gali M, Zanzoni S, Bernardi P, Covi V, Tabaracci G, Malatesta M (2020) Ozone activates the Nrf2 pathway and improves preservation of explanted adipose tissue in vitro

The committee advised the FDA