Is this an opportunity for a startup?

Help crowdsource payments for random DNA tests of the food at local stores. Fish and olive oil, to start.

If a group of people know everyone involved and do a round robin for who collects the samples and which lab to send them to, it should be more trustworthy than any alternative.

(The samples need to be sent in without packages, so employees at the testing labs can't call the stores and charge for faking the tests.)

Edit: Hmm, the business opportunity might rather be with automating lab tests..?