Hominy has not been formally tested by Monash University or FODMAP Friendly, the two main organizations that certify foods as low or high FODMAP. That means there’s no official green-light serving size for it. However, understanding what hominy actually is and how it’s made offers strong clues about where it falls on the FODMAP spectrum, and the signs are encouraging.
Why Sweet Corn Is High FODMAP
The main FODMAP in corn is sorbitol, a naturally occurring sugar alcohol (polyol) that gives sweet corn its sweetness. A full cob of corn on the cob is considered high FODMAP because of this sorbitol content. Canned sweet corn kernels are also problematic: even small servings of certain varieties are high FODMAP, and larger portions push the sorbitol load higher still.
Here’s the important distinction. Not all corn is the same. Varieties grown to be eaten as a vegetable (the sweet, juicy kind you’d grill at a barbecue) are bred for high sugar content, which means more sorbitol. Varieties grown to be milled into flour or starch are naturally lower in sorbitol and higher in starch. Starch is not a FODMAP. That’s why corn tortillas, polenta, cornmeal, and corn pasta are all considered safe during the elimination phase of a low FODMAP diet, as long as no high FODMAP ingredients have been added.
What Makes Hominy Different From Sweet Corn
Hominy is made from dried field corn (a starchy variety, not sweet corn) that has been soaked and cooked in an alkaline solution, typically lime water or lye. This process, called nixtamalization, strips away the hull and germ and fundamentally changes the corn’s internal chemistry. The starch granules in the outer layers of the kernel fully gelatinize, while the inner layers partially gelatinize. This restructuring increases resistant starch content and breaks down the original carbohydrate architecture of the grain.
Because hominy starts as a starchy field corn rather than a sweet corn variety, its baseline sorbitol content is already lower. The alkaline cooking process then further transforms the remaining carbohydrates. While no study has directly measured FODMAP levels in finished hominy, the combination of low-sorbitol corn plus extensive processing puts hominy in a very different category than a cob of sweet corn.
Where Hominy Likely Falls
Given that corn flour, corn starch, and corn tortillas (all made from similar starchy corn varieties) are accepted as low FODMAP, hominy is a reasonable choice for most people following the diet. It’s essentially the same type of corn in a less processed form than flour, just cooked whole kernels. Many people on low FODMAP diets eat hominy without issues, and dietitians who specialize in FODMAP guidance generally treat it similarly to other starch-based corn products.
That said, “not formally tested” means you’re working without a verified safe serving size. If you’re in the strict elimination phase, the cautious approach is to start with a small portion (roughly half a cup) and see how your body responds before increasing. If you’ve already reintroduced sorbitol and know your threshold, you have even more flexibility.
Choosing Canned Hominy
Most canned hominy has a very simple ingredient list: hominy, water, and salt. Some brands add sodium bisulfite as a color preservative, which is worth noting if you’re sensitive to sulfites but isn’t a FODMAP concern. You won’t typically find garlic, onion, honey, or other common high FODMAP additives lurking in plain canned hominy.
Check the label anyway. Flavored or seasoned varieties could include onion powder, garlic, or high fructose corn syrup. Stick with plain white or yellow hominy and season it yourself with FODMAP-safe ingredients. Dried hominy that you cook from scratch is even simpler, since it’s just the corn itself with no additives at all.
Hominy-Based Foods to Consider
Hominy shows up in several dishes that can work well on a low FODMAP diet with minor adjustments. Pozole, the traditional Mexican soup, uses whole hominy kernels as its base. If you make it at home, swap onion for the green tops of scallions and skip the garlic or use garlic-infused oil instead. Grits are ground hominy and follow the same logic: plain grits made with water or a low FODMAP milk are a solid breakfast option.
Masa harina, the flour used to make corn tortillas and tamales, is also made from nixtamalized corn. It’s widely accepted as low FODMAP. If you tolerate masa-based foods well, whole hominy kernels are unlikely to cause problems either, since they share the same source ingredient and processing method.