Yes. Different things and methodologies work for different people. Everyone has to find what works best for them individually. I support your reading of medical literature. I'm a rabid reader of medical abstracts , but they're quite technical and complicated and not for everybody. Tests can be helpful in formulating a personal recovery plan, but understand if you don't have insurance to cover them. Often, they come back "normal", but that's fairly common with Long Haulers. I am a fond believer in the (right supplements for me) and assess nutrition and supplements from a whole body, holistic approach since adding one can negatively impact another. Good for you finding supplements as a low cost "treatment" for you.