[Solved]: Why do people commonly take this supplement

Why do people commonly take this supplement? From studies, is it safe? Does it work for the condition? What are the interactions and/or concerns when using this product? What do the symbols USP, GMP, NSF,USDA, and Consumer Lab mean when found on a supplement? Expand more than what the letters mean. Provide documentation of references used which should be not older than 5 years.