Yup, I know someone who had COVID and it completely broke/made their sense of smell of certain foods disappear, and later it was "repaired" right away after tak

Yup, I know someone who had COVID and it completely broke/made their sense of smell of certain foods disappear, and later it was "repaired" right away after taking a single dose of LSD. That person had no idea of this, and found other anecdotes posted online, so it wasn't a placebo. The way how I imagined this worked is that COVID weakened/malformed some neural connections responsible for remembering these smells but LSD fired these temporarily. So I recommended to that person to regularly pay attention to these smells so the connection doesn't fade over time. Few months later it was still in full effect - I know it's highly anecdotal and not very scientific reasoning but still it was a nice unexpected side effect