Some Long Covid symptoms, e.g., alcohol intolerance, could be due to lowered activity of aldehyde dehydrogenase, particularly ALDH2. I submitted a related hypothesis to the Patient-Led Hypothesis Generation Panel which provides background & refs (1).
Inhibition of aldehyde dehydrogenase causes lower sperm count & has been investigated as a means of male birth control (2).
1- https://docs.google.com/document/d/1XBe3xkZLUtcTUZjd07nH97jjL9QR5Vt3YS08zo7WpOY/edit?usp=sharing
2- https://www.bloomberg.com/news/features/2017-08-03/why-we-can-t-have-the-male-pill
#LongCOVID #aldh2 #retinoicacid #spermatogenesis