Inulin Challenge - Testing every 30 mins & extending your challenge

Your Inulin Challenge – What You Need to Know

Inulin is a FODMAP that can take a little longer for your body to process. Since none of us have the enzymes needed to break down inulin in the small intestine, it always travels to the large intestine, where fermentation takes place.

This means it’s completely normal to see a delayed rise in your fermentation levels during this challenge — sometimes even hours later. If you know you have slow gastric transit, this is especially worth keeping in mind.

Why the 30-minute test interval?

If your fermentation levels remain low at the start of your inulin challenge, the app will prompt you to test every 30 minutes instead of every 15. Don’t worry — this isn’t a glitch.

As soon as your fermentation scores begin to rise, the interval will switch back to every 15 minutes so we can capture the precise change linked to inulin. This way, you’re still getting accurate results without unnecessary extra testing.

Extending your challenge

Sometimes, fermentation may remain low all the way to the end of the standard 3-hour testing window. In this case, the app gives you the option to extend your challenge.

👉 If you feel comfortable, you can continue testing beyond the 3 hours — without eating — to catch any late rise in fermentation.

If you’re too hungry to extend

It’s completely understandable if you don’t want to continue fasting. In that case, we suggest breaking your fast with a small, low FODMAP snack or light meal.

• This helps you feel more comfortable.
• If you notice a rise in fermentation later in the day, you’ll know it’s most likely related to the inulin, not the food you ate.
• In fact, a light meal may even help move inulin through your digestive tract, making any response clearer, just make sure it's a low FODMAP meal.

✨ Remember: Everyone’s digestive system is unique, and a late rise during an inulin challenge is normal. By following the prompts and testing at the right times, you’ll still uncover valuable insights into how your body responds to this FODMAP.

If you have any concerns or questions, our CX team is always here to support you: hello@foodmarble.com

Updated on: 06/10/2025