In general, for our purposes there are two types of corn: Regular corn (Maize) and Sweet Corn. Regular corn is by far the most common and found in most processed foods including cornmeal, tortilla chips etc. Sweet corn on the other hand is most commonly found in grocery stools in its unprocessed state– either on the cobb during peak seasons or cut corn that is frozen or canned.
The main difference between the two types of corn is their sugar content. Regular corn is considered FODMaP Friendly as it has less fermentable sugar. Sweet corn, on the other hand is NOT Friendly due to higher amounts of fermentable surgar.
But, remember, just because it is FODMaP Friendly doesn’t mean that it is IBS Friendly.
If you think corn may be an issue for you, it may also be due to the large amount of insoluble fiber it contains. When eating whole cut corn or corn on the cobb, there is a lot of insoluble fiber and for many people with IBS, this is a major trigger for IBS symptoms.
One approach would be to avoid corn during the elimination phase- the first two weeks, then try reintroducing regular corn. I would limit your intake to 1/2 a cob or 1/2 cup per serving.
If it causes symptoms then simply cross it off the list.
Hope you found this helpful!