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# What to eat before a Challenge?

### Preparing for Your FoodMarble Challenge

Getting ready for a FoodMarble Challenge may feel a little restrictive, but following these steps will give you the clearest, most useful results. Think of it as setting yourself up for success — a short bit of preparation for valuable insights into your digestion.

### The Day Before

👉 Last meal before fasting: **make it low FODMAP.**

Think plain and simple: potatoes, rice (white or basmati), rice noodles, meat, fish, eggs, walnuts, cucumbers, carrots, olives, kiwi, strawberries.

* Find recipes in the **Recipes** section of the FoodMarble app or on the [FoodMarble blog](https://foodmarble.com/more/recipes/)
* Read our full guide on [how to prepare for a Challenge](https://foodmarble.com/more/articles/pre-challenge-meals/?srsltid=AfmBOorYqjAaKqR-XwNnQUVNB1P_Gyq5fcYRQDt6hFt3QXqd4IFxGdZc)

💡 *Keeping things simple here means your results tomorrow will be easier to interpret.*

### The Morning of Your Challenge

👉 No food except for the test food or FODMAP substrate.

**Drink water** as needed, but:

* Avoid excessive amounts (can affect results)
* Stick to sipping **still water only**

💡 *A little thirst is okay — you’ll be eating again soon.*

### During the 3-Hour Test Window

* **Do not eat** any other foods.
* Continue drinking **still water** in moderation.

💡 *You will probably feel super hungry during the test and this may feel very strict, but it ensures your results reflect exactly how your body responds.*

### After the Test Window Ends

If **no rise** in fermentation levels during the 3-hour test window:

* Eat a light **low FODMAP meal** that you know you tolerate well
* Keep testing **hourly** with your FoodMarble device

💡 *This helps detect any late rises (common with certain FODMAPs like inulin), giving you a full picture of your response.*