edit:
I've also not written anything about methodology, so I hope my writings have not given the impression that one can play fast and loose with supplements. I actually follow a safety-first approach, and I do this only after a doctor reaches a dead-end.
General approach for evaluating supplements:
1- Find out about something that sounds promising, either by accident, or googling ideas and stumbling upon something that claims to improve your condition in some way.
2- Skim reputable sites (that cite research) listing the potential pros and cons of the supplement in question. Stop here if there is an unacceptable level of risk.
3- Skim any research about the supplement vs. your condition.
4- Read Amazon/iherb/other customer reviews for formulations of the supplement. Do not get excited. Most of these reviews are fake. What you are doing here is scoping out the ideal claimed outcome as a screening tool. If the ideal outcome is not worthwhile, stop here.
5- Dig into the research yourself. Confirm the level of risk. Check interactions. Determine whether there is a chance of the supplement working.
6- Purchase and test product. Remain objective. The baseline expectation is that nothing will work. Don't be emotional about that. I love having experience with products regardless of whether they work for me or not. I find it very interesting either way.