Chocolate (dark)

Low FODMAP

By Michael EisenwasserUpdated October 6, 2026

Serving sizes

Chocolate (dark) changes rating with portion size. These are the amounts tested in the literature behind our ratings.

About 5 squares (25g) Low
Larger portions Moderate
Much larger portions High

Fructans Lactose

Dark chocolate is Low FODMAP at about 5 squares (25g), with Fructans and Lactose building as the portion grows.

Dark chocolate is low at about 5 squares (25g).
Fructans and Lactose build at larger portions to moderate and at much larger portions to high.
Fillings, syrups or extra dairy can shift the picture, so plain dark bars are the most predictable.

Enjoy a few squares as a treat and savor them slowly rather than working through the whole bar.

Why chocolate (dark) is rated low

Dark chocolate comes in low at about 5 squares (25g), so it is one of the few sweet things that fits the diet without a workaround. A plain dark bar is mostly cocoa solids, cocoa butter and sugar, and the small amounts of fructans and lactose it carries stay low at that serve. The climb is the real content of this page: larger portions are moderate and much larger portions are high, as fructans and lactose build. Dark chocolate is therefore not a food to avoid, it is a food where the size of the helping decides the outcome, and those amounts are easy to cross when the bar stays open on the table.

What changes your risk

Serving size The whole story is serving size: low at about 5 squares (25g), moderate at larger portions, high at much larger portions, with no other lever to soften it.
Spreading it across the day The same day's chocolate is easier to keep at about 5 squares (25g) a sitting when it is spread out than when it is all eaten at once. Grazing straight from the bar is how a few squares quietly become most of a bar.
The rest of the meal Dark chocolate brings a little fructans and lactose, so it adds to anything else in the meal carrying the same groups. Chocolate after a creamy dessert, or alongside wheat-based sweets, lands on top of whatever the meal already carried.
What is in the bar besides cocoa Fillings, caramel, honey centres, chocolate coated dried fruit and bars with added inulin or chicory root fibre are different products with different loads. Dried fruit is worth flagging on its own, because drying removes the water and concentrates everything left behind, so a chocolate coated dried fruit is not the plain bar with fruit added.
Melting is not a lever Melting chocolate for a sauce, baking with it, or chilling it again does not change its FODMAP content. Heat and cold leave these carbohydrates intact, so chocolate in a baked dish counts the same as chocolate off the bar.

What else works

A plain dark bar with a short ingredient list is the predictable version, and it is the one these serves describe. The lookalikes on the same shelf are the ones to check. Sugar free and no added sugar chocolate is usually sweetened with sugar alcohols such as maltitol, xylitol or isomalt, and those make it a worse option, not a gentler swap. Milk chocolate and white chocolate are separate foods carrying much more dairy, so look them up in their own right rather than assuming they follow these serves. Filled bars, honey centres and chocolate coated dried fruit are their own thing too. If you want the bar to stretch further, dark chocolate with peanuts, walnuts, macadamias or pecans works, while bars studded with cashews or pistachios do not.

How to keep it low

Buy on the ingredient list rather than the cocoa claim on the front, since a plain bar should read as cocoa mass, cocoa butter, sugar and little else, and inulin or chicory root fibre is a common addition in high fibre and reduced sugar bars. Break off about 5 squares (25g), put the rest away wrapped, and eat it away from the packet, because the bar left open beside you is what moves a few squares into larger portions. Store it somewhere cool and dark so it does not bloom and get eaten faster to use it up. Serving it at the end of a meal with coffee, rather than on a plate of assorted sweets, keeps the helping visible and keeps it from landing on top of another dessert.

Common questions

is dark chocolate low fodmap

Yes at about 5 squares (25g). Larger portions are moderate and much larger portions are high, so the helping is what decides it.

how much dark chocolate can i eat on a low fodmap diet

About 5 squares (25g) is low. Larger portions are moderate and much larger portions are high, so weigh a portion once to see what 25g looks like from your usual bar.

is sugar free chocolate a better choice

No. Sugar free and no added sugar chocolate is usually sweetened with sugar alcohols such as maltitol, xylitol or isomalt, which are not a low FODMAP swap for a plain dark bar.

does a higher cocoa percentage change the rating

The serves here apply to plain dark chocolate in general and are not broken out by cocoa strength, so there is no basis for saying one percentage runs lower than another. Plain bars with a short ingredient list are the most predictable either way.

Learn more

Where this rating comes from

Chocolate (dark) is rated from published lab measurements of its FODMAP content, using the low, moderate and high cutoffs of Varney et al. (2017).

Feedback sent through the FODMAP Foods app has led to changes in this list.

See our full rating method →

Sources

Fructan and free fructose content of common Australian vegetables and fruit. Muir et al. (2007), J. Agricultural and Food Chemistry 55(16):6619-6627.
Measurement of short-chain carbohydrates in common Australian vegetables and fruits by high-performance liquid chromatography (HPLC). Muir et al. (2009), J. Agricultural and Food Chemistry 57(2):554-565.
Quantification of fructans, galacto-oligosaccharides and other short-chain carbohydrates in processed grains and cereals. Biesiekierski et al. (2011), J. Human Nutrition and Dietetics 24(2):154-176.
Dietary sorbitol and mannitol: food content and distinct absorption patterns between healthy individuals and patients with irritable bowel syndrome. Yao et al. (2014), J. Human Nutrition and Dietetics 27(Suppl 2):263-275.
FODMAPs: food composition, defining cutoff values and international application. Varney et al. (2017), J. Gastroenterology and Hepatology 32(Suppl 1):53-61. Supplies the low, moderate and high cutoffs used on this page.