Is Sucrose Allowed on a Low FODMAP Diet? The Complete Guide

December 8, 2025 •

4 min read

Fact: Standard table sugar, or sucrose, is a disaccharide made of one glucose and one fructose molecule in a 1:1 ratio. This specific composition is why, for most people, the question of 'is sucrose allowed on a low FODMAP diet?' is answered with a resounding yes, though moderation is key.

Quick Summary

Sucrose is generally considered low FODMAP because its balanced 1:1 glucose-to-fructose ratio ensures efficient absorption in the small intestine, unlike problematic excess fructose. Special attention is needed for those with sucrose intolerance.

Key Points

Sucrose is Low FODMAP: Standard table sugar, or sucrose, is generally considered low FODMAP because it consists of equal parts glucose and fructose, allowing for efficient absorption.
D is for Lactose: The 'D' in the FODMAP acronym stands specifically for lactose, not all disaccharides. Sucrose is not in the same category as problematic lactose for most individuals.
Excess Fructose is the Issue: Sugars that contain more fructose than glucose, such as high-fructose corn syrup, are high FODMAP because the excess fructose is poorly absorbed and causes digestive issues.
Moderation is Important: While low FODMAP, sucrose is still an added sugar. Excessive intake can cause gut irritation regardless of FODMAP content.
Check for Hidden FODMAPs: Always read food labels, as many products sweetened with sucrose may contain other high-FODMAP ingredients.
Sucrose Intolerance is a Factor: A small number of individuals have sucrase-isomaltase deficiency (sucrose intolerance), which can cause IBS-like symptoms. If you don't respond to the low FODMAP diet, consider discussing testing with a professional.

The Science Behind Sucrose and FODMAPs

To understand why sucrose is different from other sugars on a low FODMAP diet, it is essential to first understand the science behind FODMAPs. The acronym stands for Fermentable Oligosaccharides, Disaccharides, Monosaccharides, and Polyols. These are short-chain carbohydrates that can be poorly absorbed in the small intestine and fermented by gut bacteria, causing uncomfortable IBS symptoms like bloating, gas, and abdominal pain.

The 'D' in FODMAP

Many assume the 'D' in FODMAP means all disaccharides are restricted. However, the 'D' specifically refers to Lactose, the disaccharide found in dairy products. Sucrose, while also a disaccharide, is treated differently on the low FODMAP diet.

Sucrose's Balanced Composition

Sucrose is a compound made of one glucose molecule and one fructose molecule. The key to its low FODMAP status lies in its balanced, 1:1 ratio of glucose to fructose. During digestion, the body efficiently absorbs the fructose because it is paired with an equal amount of glucose. In contrast, high-fructose corn syrup and honey are high in FODMAPs because they contain excess fructose, which overwhelms the body's absorption capacity.

How to Use Sucrose on the Low FODMAP Diet

While sucrose is generally well-tolerated, it is still added sugar and should be consumed in moderation as part of a healthy, balanced diet. This is because consuming large amounts of any sugar can act as a gut irritant. When incorporating sucrose, it's important to be mindful of the products you choose.

Tips for using sucrose:

Check ingredients: Many foods containing table sugar (sucrose) may also contain other high-FODMAP ingredients, such as honey, agave, high-fructose corn syrup, or fruit juices. Always read the label carefully.
Baking and cooking: Plain, granulated white sugar, brown sugar, or caster sugar are suitable for low FODMAP recipes.
Sweeten beverages: A small amount of table sugar in tea or coffee is generally fine.

Sucrose vs. Other Sweeteners on a Low FODMAP Diet

Understanding how sucrose compares to other common sweeteners can help in making informed choices while following a low FODMAP diet. High-fructose corn syrup (HFCS), for example, is a common high FODMAP ingredient, but its composition varies. Sucrose is distinct due to its fixed 1:1 ratio.

Sweetener Comparison


Sweetener	FODMAP Category	Key Composition	Status on Low FODMAP Diet	Potential Issues
Sucrose (Table Sugar)	Disaccharide	50% Glucose, 50% Fructose	Low FODMAP, in moderation	Individual intolerance (CSID)
High-Fructose Corn Syrup (HFCS)	Monosaccharide (Fructose)	42-55% Fructose, 45-58% Glucose	High FODMAP, due to excess fructose	Fructose malabsorption symptoms
Maple Syrup	Monosaccharide	Glucose, Fructose, Sucrose	Low FODMAP, limited serving size	Excess amounts can cause issues
Honey	Monosaccharide (Fructose)	Variable, often excess Fructose	High FODMAP	Fructose malabsorption
Stevia	N/A (Non-sugar Sweetener)	Glycoside	Low FODMAP	Additives in powdered versions

The Exception: Sucrose Intolerance

While sucrose is generally low FODMAP, some individuals may have a specific issue with its digestion, known as sucrose intolerance. This can occur due to a deficiency in the enzyme sucrase-isomaltase, either congenitally (CSID) or acquired. This can cause undigested sucrose to reach the large intestine, where it is fermented by bacteria, leading to symptoms that can mimic or worsen IBS. If symptoms persist despite following a low FODMAP diet, testing for sucrose intolerance may be necessary.

Navigating Sweeteners on a Low FODMAP Diet

For those managing IBS, navigating the world of sweeteners can be tricky. Here's a breakdown of some options beyond standard sucrose:

Monash-approved sweeteners: The Monash University FODMAP app is the most reliable resource for checking the FODMAP content and serving sizes of various foods and sweeteners. Always consult the app for specific guidance.
Liquid vs. Powdered Stevia: As noted in some sources, liquid stevia extracts are often preferable to powdered versions, which may contain high-FODMAP fillers like erythritol.
Natural options: In addition to maple syrup, rice malt syrup is another low FODMAP option.
The bigger picture: Remember that managing IBS involves more than just restricting specific sugars. A comprehensive approach considering overall diet, stress levels, and other triggers is important. Consulting a trained dietitian is highly recommended.

Conclusion

In short, standard sucrose, or table sugar, is generally allowed and considered low FODMAP because its equal ratio of glucose and fructose allows for proper absorption. However, context is crucial: moderation is key, and it's essential to check products for other high-FODMAP ingredients. For a minority, sucrose intolerance is a real concern that can cause IBS-like symptoms, and medical consultation is warranted in these cases. By understanding the nuances of how sucrose is digested, individuals can make informed choices to manage their symptoms effectively. For further trusted information on the low FODMAP diet, visit the Monash University Low FODMAP Diet.

Frequently Asked Questions

No, table sugar (sucrose) is considered low FODMAP by Monash University. It is composed of equal parts glucose and fructose, which facilitates its absorption in the small intestine, preventing the fermentable issues associated with excess fructose.

Sucrose has a 1:1 ratio of glucose and fructose, making it low FODMAP. High-fructose corn syrup (HFCS), however, contains more fructose than glucose, which can lead to poor absorption and is therefore high FODMAP.

No, honey and agave syrup are considered high FODMAP sweeteners because they contain an excess of fructose relative to glucose, which can cause symptoms in individuals with fructose malabsorption.

No. The low FODMAP diet distinguishes between different types of sugars. While certain high-fructose sweeteners and sugar alcohols are high FODMAP, sucrose, maple syrup (in limited amounts), and stevia are generally considered low FODMAP.

Sucrose intolerance is a condition caused by a deficiency in the sucrase-isomaltase enzyme needed to break down sucrose. When undigested sucrose reaches the large intestine, it can cause symptoms similar to IBS, such as bloating and diarrhea.

Symptoms of sucrose intolerance often mimic IBS. If you continue to experience symptoms despite following a strict low FODMAP diet, it is recommended to discuss breath testing or other diagnostic procedures with a gastroenterologist or dietitian.

No, moderation is still key. Large amounts of any sugar can be a gut irritant, even if it is low FODMAP. For individuals with IBS, overall sugar intake should be limited.

Safe low FODMAP sweeteners in moderate amounts include table sugar (sucrose), maple syrup, rice malt syrup, and stevia.

No, most common sugars like white, brown, and cane sugar are low FODMAP because they are primarily sucrose. Always double-check ingredient lists for other added FODMAPs.