Has anyone had their vitamin A tested?

I'm curious if it plays a role in any of our long covid symptoms. I've read a theory that covid can cause inflammation in the liver which could cause the liver to dump stored retinol into the bloodstream which in turn would cause hypervitaminosis A, but I don't know if that was ever looked into. I've also read that vitamin A gets severely depleted during bad infections and that supplementing might be a good idea.

Has anyone gotten their vitamin A levels tested? Would really like to hear your results!