certain minor symptoms could be missed - like weakness, dizzyness, all over itching, bloating, tiredness etc...so you could have them and not really give them much thought - though if they are not bothering you don't worry about it.
i had this test too - turned out all i could 'safely' eat was vegetables!
it said i was intolerant to dairy, yeast, salt, sugar, fungi, mould, - and you'd be surprised how much stuff contains variants of these things - like whey for instance.
i just eat what i like and take tablets...