@parrotqueen, I appreciate your sharing your experience with supplements and the research you do to verify their contents. Knowing many people is referred to as "anecdotal evidence" and I'd like to take this opportunity to talk about anecdotal vs scientific evidence.

Most scientific and medical discoveries have their roots in anecdotes, which have led to hypotheses that are then proved by rigorous testing. The rigorous testing is "scientific evidence." This article is a wonderful explanation of anecdotal evidence, its importance and the danger of the anecdote. It also includes a great comparison table comparing between reliable and unreliable use of anecdotal evidence.

I encourage everyone to read this:
- Smart Health Choices: Making Sense of Health Advice. Chapter 8: The weakness of one https://www.ncbi.nlm.nih.gov/books/NBK63643/