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COVID-19 is, in the end, an endothelial disease

Excerpt: “This essay explores the hypothesis that COVID-19, particularly in the later complicated stages, represents an endothelial disease. Cytokines, protein pro-inflammatory mediators, serve as key danger signals that shift endothelial functions from the homeostatic into the defensive mode. The endgame of COVID-19 usually involves a cytokine storm, a phlogistic phenomenon fed by well-understood positive feedback...

What are Free Radicals and Oxidative Stress? A Bal...

There is lots of discussion about reducing oxidative stress, the importance of antioxidants to reduce free radicals. But what does it mean on a biochemical level? And is it really all that simple? Is there some yin and yang in play? Just like for anything else, there is a time and a place for everything, even free radicals have their necessary role in the human body. For example, free radicals play a natural role in  heart...