As you begin to understand the FODMAP diet, you need to recognize that FODMAPs are dose-dependent. This means the higher the dose, the higher the likelihood that you’ll feel sick.
One day, your overall dose of FODMAPs may be low. So, that apple you ate or cheese or garlic or onions or pasta or whatever didn’t bother you. But the next day, your overall dose is just too high. Once you cross your personal threshold, symptoms are bound to follow.