When in doubt, leave it out.
Seriously, there are many labs across the U.S., but you can expect to pay no less than $50 for a base level inspection. The full workups that supplement companies have to use (to test for contaminants, check quantities, verify ingredients, etc) typically cost $250 per pill.
To me, it would be better to err on the side of caution and throw away the couple dollars for S/H charges than risk your health. Also, if it was a "free trial", make sure you cancel with them right away so you don't get their automatic shipments that are astronomically priced. Good luck and I hope I helped!
