An elimination diet is the best way to find out if you have any particular trigger foods, this is the point of the low-fodmap diet. You're not supposed to stay on it for life(it's really not good for you long term), just long enough to figure out what's causing your personal issues, because everyone is different. Once you're on the elimination diet your symptoms won't disappear as your gut needs time to heal, however there should be a noticeable increase in discomfort/symptoms when you reintroduce a trigger food, therefore you need to eliminate that food specifically until your gut is healed. My functional medicine practitioner suggested this could take 6-18months, after which I might be able to enjoy trigger foods in small quantities. I've been listening to the ZOE health podcast, all about gut health/microbiome, to get ideas for food swaps I can make that my guts will appreciate 😊