Low-FODMAP Sweeteners: What to Use Instead of Honey and Agave

Michael Eisenwasser 7 min read

Sweeteners are one of the trickier corners of the low-FODMAP diet. Sugar is fine. Honey is not. Agave is worse than honey. Most sugar-free products are worse than both. A bunch of "natural" choices (coconut sugar, yacon, sugar alcohols) are off the list, and a few things that sound synthetic (aspartame, sucralose) are actually fine.

This post is a practical ranked guide. What to reach for, what to skip, and what to watch for on labels.

The rule in one sentence

For sweeteners, the issue is almost always one of three things: excess fructose, fructans (like inulin), or polyols (sugar alcohols). Once you know which of those are in the jar, the ranking falls out on its own.

Fructose is the big one. Your small intestine absorbs fructose slowly through a transporter called GLUT5. When fructose arrives alongside roughly equal glucose, a second transporter (GLUT2) helps pull it across, and absorption works fine (Latulippe & Skoog, 2011). When fructose is in excess, the leftover amount keeps going, reaches the large intestine, pulls in water, and gets fermented by gut bacteria. That's where symptoms come from.

So the test for most sweeteners is: how does glucose stack up against fructose? If glucose is equal to or greater than fructose, you're usually fine. If fructose wins, you probably aren't. Background on the full framework is in what are FODMAPs.

Safe sweeteners (ranked)

1. Pure maple syrup. The workhorse. Mostly sucrose, which splits 1:1 into glucose and fructose on digestion, so fructose always travels with a glucose partner. Monash lists it low FODMAP at a generous serve for a sweetener (check the app for the exact grams). Swap it 1:1 for honey in tea, oatmeal, yogurt, dressings, and most baking. Buy 100% pure. "Pancake syrup" and "maple-flavored syrup" are usually high-fructose corn syrup with coloring.

2. Table sugar (sucrose). Regular white sugar is low FODMAP at standard serves. Same reason maple syrup works: sucrose is half glucose, half fructose, and they land together. Brown sugar and cane sugar behave the same way. Not a "health food," but it's the most reliable sweetener on the diet.

3. Dextrose (pure glucose powder). Literally glucose. Zero fructose. If you're nervous about fructose at all, this is the lowest-risk option you can put in a coffee or a baked good. About 70% as sweet as table sugar, which takes some adjustment in recipes, but it's a cheat code for people who are still figuring out their tolerance.

4. Glucose syrup. Pure glucose syrup is fine. Some US "light corn syrups" (like Karo-style baking syrup) are mostly glucose, but formulations vary by brand, so read the label instead of assuming. The one to always avoid is high-fructose corn syrup, which is a completely different product despite the similar name.

5. Rice malt syrup (aka brown rice syrup). Made from fermented rice, mostly glucose and maltose, essentially no fructose. Low FODMAP at about 1 tablespoon per serve. Useful in sauces and baking when you want that thick honey-like texture without the honey.

6. Stevia (pure steviol glycosides). Low FODMAP and calorie-free. The catch is that a lot of commercial stevia products are blended with inulin (a fructan, which is high FODMAP) or with polyols like erythritol. Read the ingredient panel. If it says "stevia blend," put it back.

7. Monk fruit. Low FODMAP on its own. Same warning as stevia: most retail monk fruit sweeteners are blended with erythritol or other polyols, so you have to check the label. Pure monk fruit extract is what you want.

8. Aspartame, sucralose, saccharin, acesulfame K. All low FODMAP per Monash. These are the "artificial" sweeteners in diet sodas and sugar-free yogurts. Whether you want to eat them is a separate question (some people find any sweetener aggravates IBS), but they do not contain FODMAPs.

Sweeteners to skip during elimination

Honey. Roughly 38% fructose and 31% glucose by weight. Excess fructose, high FODMAP at typical serves. Some varieties have a very small green-zone serve in the Monash app, but it stacks badly with the rest of an elimination-phase meal, and maple syrup does the same job with more margin. Full breakdown in is honey low FODMAP.

Agave. Often sold as the "natural" honey alternative, but it's actually worse. Agave nectar is 70 to 90% fructose, so the glucose-to-fructose ratio is even more lopsided than honey's. High FODMAP at very small serves.

High-fructose corn syrup (HFCS). In the name. Standard in sodas, flavored yogurts, jarred sauces, and a lot of commercial salad dressings. Read labels during elimination.

Coconut sugar. High FODMAP beyond very small serves. Skip it during elimination, revisit during reintroduction if you care about it.

Yacon syrup. Marketed as a prebiotic sweetener, which is another way of saying "high in fructans." High FODMAP. Skip.

Sugar alcohols (polyols)

These get their own section because they are the "P" in FODMAP. Most of them are not well-absorbed, which is exactly what makes them problematic. The ones to avoid:

• Sorbitol
• Mannitol
• Xylitol
• Maltitol
• Isomalt
• Lactitol

Sugar alcohols are the best-documented sweeteners for triggering IBS symptoms. They pull water into the small intestine and get fermented in the large intestine, which produces gas, bloating, and loose stools at pretty small doses.

Erythritol is the better-tolerated exception. It's absorbed in the small intestine much more efficiently than the other polyols, so it doesn't ferment the same way, and most people with IBS handle small amounts without issues. Larger doses can still cause GI symptoms on their own, so it's not a "free pass." It's also often blended with other polyols in commercial "sugar-free" products, so the label still matters. A small amount of an "erythritol + monk fruit" blend is usually fine. Anything labeled "erythritol + xylitol + maltitol" is not.

Sugar alcohols show up in sugar-free gum, mints, protein bars, "keto" desserts, cough drops, children's vitamins, and a shocking number of toothpastes. If you've done everything else right on elimination and still feel bad, check the gum.

Hidden offenders on labels

Three places FODMAP-problem sweeteners sneak in even when you're being careful.

Added fibers on the ingredient panel. Inulin, chicory root fiber, and FOS (fructo-oligosaccharides) are all fructans, and they get added to a lot of "healthy" products for fiber content. These are always declared by name, so scan the ingredient list specifically for them. More detail in the low-FODMAP grocery list.

Protein bars and "fiber" bars. Even "clean" bars often have inulin, chicory root fiber, or FOS for added fiber, plus sugar alcohols for sweetness. Read both the sweetener and the fiber source.

Sugar-free gum, mints, and diet drinks. Most sugar-free gum is sweetened with xylitol or sorbitol, and chewing a few pieces after meals can easily deliver a symptomatic dose of polyols. Switch to gum sweetened with aspartame or sucralose during elimination, or skip gum for a few weeks to see if it's what's getting you.

Serving sizes still matter

Sweeteners that are low FODMAP at a standard serve can still tip high if you pile them up. This is FODMAP stacking: you can have a tablespoon of maple syrup, or a tablespoon of rice malt syrup, but pouring a big drizzle of each plus a sprinkle of coconut sugar at the same meal pushes you over.

Treat the serving sizes on Monash's app as ceilings, not targets. For most everyday use (a drizzle on oats, a spoon in tea, a splash in a dressing), the allowances are plenty.

What this looks like day to day

For most people, the whole question collapses to four choices:

• Coffee or tea: table sugar or pure stevia.
• Oatmeal, yogurt, toast: maple syrup.
• Baking: table sugar, with maple syrup or rice malt syrup swapped in where a recipe calls for honey.
• Drinks you buy: regular sugar versions, not "sugar-free," and not anything with HFCS.

That covers about 95% of real-life sweetener decisions on the diet. The polyol and hidden-ingredient traps above cover the other 5%, which is usually where people trip up.

If you want a clean reintroduction phase later (testing whether fructose, fructans, or polyols are your actual triggers), the best thing you can do in elimination is keep sweeteners simple. One clear swap (maple for honey), one default (regular sugar), one label rule (no polyols except erythritol), and you've eliminated the most common sweetener mistakes in one pass.

Track your symptoms and discover patterns with FODMAP Tracker. Includes a database of 1,000+ foods with FODMAP ratings.