Possible but untested. You may be interested to see this recent study that draws a mechanistic link (broadly, microglial inflammation) between the symptoms of long covid and "chemobrain" following chemotherapy [0]. The authors do suggest treatments proposed to restore cognition post-chemotherapy may also be applicable to long covid, e.g. metformin [1].
Nir Barzilai and a team of researchers are leading a large clinical trial to test the benefits of metformin in slowing the aging process, which is upstream of so many diseases that yeah, it could just be a cheap cure-all. Sadly requires a prescription in the US. But berberine is the off-the-shelf equivalent.
Yeah agreed. Is berberine really an equivalent though if the mechanisms are different and the not knowing metformin’s complete mechanism although it has a pleitropic effect? Metformin is heavily studied in comparison too.