Was this known early on about COVID? Early on in the lockdown I noticed that these vitamins were among the kind of weird items completely cleared out of stores. People were very selective... initially all FHD laptops and Chromebooks were gone, along with power strips, ibuprofen, hair clippers, etc.
[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7189189/ [2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3308600/#:~:tex....