I have been to a slew of doctors over the past few years looking for the cause of (a few things). This test was 1) cheaper, 2) no blood, poo, or pee involved, and 3) they did get back to me pretty fast, given it was done over snail mail. I didn't answer much on the form regarding existing allergies/suspected sensitivities, but it found all of them (and more). I'm super happy - it found a magnesium deficiency that has been suspected, but never actually found in all the blood-work I've had (but which is likely a contributing factor to some other issues). So I am super happy with this and going to get it done for my daughters as well - just because - why not - it's insightful, and more than the test from the doctors office have been for sure.