And there were semi popular sports personas who did daily testing and charted foods to changes.
My favourite blogger was a women who's sport involved falling into the dirt and eating it often as a result. Her bacteria profile was mostly a bacteria type found in dirt.
The field is open for a better managed company to take on these challeges.
Can you verify that they changed in ways that corresponded with your diet? It's possible if they were exceptionally lazy that they just generated a new report for each date haha.