having spent considerable time in north africa, where severe stomach problems (i.e. the squits and the vomits) caused by the combination of lack of food hygiene and hot weather are prevalent and can overwhelmingly devastate you, without the humble potato many folk would be dead...
the local cure is boiled potato, boiled egg, cumin powder, salt and olive oil, all mashed up together in their version of an ovenbottom muffin = your tummy settles within the hour, guaranteed.
try it next time you're tummy is on the run, you'll see.
(the key is lots of cumin powder)