I had an episode after eating shrimp that led me to have my blood tested (at the doctor) to see if the reaction I had was an allergy or something else. My results came back all positive for shellfish, so I decided to purchase Pinnertest in order to investigate further. Not only did shellfish not show up but only two things did - corn and poppyseed, both of which I rarely eat. Super disappointed especially when paying so much money.
Bottom Line: No, I would not recommend this to a friend