Call me 'crazy' - I have a feeling it's "in the mail" LOL, but I try to find 'quality' supplements, and so some that I order from are:
Life Extension
QNLabs.com
YES (brand) - available on Amazon
I've taken plenty of NOW brand supplements over the years.
I know my diet is lacking -- and I have experienced a number of positive effects through supplementing over the years. I view it as an investment!!
Best wishes in your search and efforts!!