Latest News: Updates on Low FODMAP Diet Food Serving Sizes


Reader,

Determining which foods and serving sizes trigger your personal IBS symptoms is a long and

grueling process. Monash University has been a great resource that I often recommend to many

of my clients to help them throughout this process. Monash University’s serving size

recommendations are based on extensive research and testing. Foods are categorized based

on their FODMAP content, which includes oligosaccharides, disaccharides, monosaccharides,

and polyols.

These carbohydrates are poorly absorbed in the small intestine and can ferment in

the gut, causing symptoms such as gas, bloating, and diarrhea.Here are the updates they have

made to their recommendations:

Brazil Nuts, Shelled, Raw

Low FODMAP: 10 nuts

Moderate GOS: 15 nuts

High GOS: 17 nuts

Brazil nuts contain Galacto-oligosaccharides (GOS), a type of FODMAP that can ferment in the

gut, causing gas and bloating. Consuming up to 10 nuts is considered low FODMAP and should

not cause IBS symptoms. Exceeding this amount increases the GOS content, which leads to

digestive discomfort.

Hazelnuts, shelled, raw

Low FODMAP: 24 nuts

Moderate GOS: 29 nuts

High GOS: 30 nuts

Similar to Brazil nuts, hazelnuts have varying levels of GOS. A serving of 24 nuts is deemed

safe and low in FODMAPs, but consumption beyond this threshold raises GOS levels,

potentially triggering IBS symptoms.

Macadamia Nuts, shelled, raw

Low FODMAP: 15 nuts

Moderate Fructan: 2 1/4 cups

High Fructan: 2 2/3 cups

Macadamia nuts are generally low in FODMAPs, with up to 15 nuts considered safe. Higher

quantities significantly increase fructan content, which can cause symptoms such as bloating

and gas in individuals with IBS.

Pecans, shelled, raw

Low FODMAP: 15 nut halves

Moderate Fructans: 2 1/2 cups

High Fructans: 3 cups

Pecans have a similar FODMAP profile, with 15 nut halves being low in FODMAPs. Larger

servings raise fructan levels, which can lead to digestive issues for those with IBS.

Walnuts, shelled, raw

Low FODMAP: 15 nut halves

High GOS: 18 nuts

Walnuts are low FODMAP at 15 nut halves but contain high levels of GOS when consumed in

larger amounts. It's crucial for individuals with IBS to adhere to the recommended serving size

to avoid symptoms.

Cola (Sweetened with Sucrose or Sugar-Free)

Low FODMAP: 1/2 cup

Moderate Fructans: 3/4 cup

High Fructans: 1 cup

Cola, both regular and sugar-free, can contain fructans. A serving of up to 1/2 cup is considered

low FODMAP. Higher amounts increase fructan content, which may cause digestive discomfort.

Garlic Pickled in Vinegar, Drained

Low FODMAP: 1 clove

Moderate Fructose: 10 cloves

High Fructose: 13 cloves

Garlic is notoriously high in FODMAPs, but pickled garlic in vinegar can be consumed in small

amounts. One clove is low FODMAP, but larger servings quickly raise fructose levels, leading to

symptoms.

Much of the FODMAP diet is based on portion control at each meal to limit any digestive discomfort. I would encourage downloading the Monash University FODMAP diet app for up to date serving sizes of FODMAP containing foods.

In good health,

Cari

Riker Nutrition Consulting

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