---
title: Use the allergen matrix
description: Answer a guest's allergy question with the safe-items filter, read the 14 allergen codes, and act on the missing-recipe warning.
order: 34
updated: 2026-09-16
keywords: allergen, matrix, guest allergy, safe items, modifiers
---

The allergen matrix lists every menu item against the allergen codes it contains, including allergens added by modifiers. Front of house uses it to answer a guest in seconds.

**Before you start:** recipes access. Allergen declarations are recorded per stock item under Safety and per menu item under Recipes.

## Read the matrix

1. Open **Recipes › Allergens**.
2. Rows are menu items; columns are the 14 allergen codes from the Malaysian declaration list.
3. A filled cell means the item contains that allergen, either from an ingredient or from a modifier.

## Answer a guest

1. Choose **Guest allergy filter** and tick the guest's allergens.
2. The matrix collapses to a safe-items list. Read it to the guest or show the screen.
3. Clear the filter afterwards.

> **Warning:** A menu item with no recipe cannot be checked. Those items show a critical banner and are excluded from the safe list. Do not assume they are safe.

## Keep it accurate

- Allergen truth starts at the stock item. Declare allergens when a new item enters the catalogue (**Safety › Allergens**).
- Modifier groups carry their own allergens, so a sauce swap changes the answer.
- Record a cross-contact event under **Safety › Allergens** when it happens, and clear it when the line is clean.

## Related

- [Read the plate cost docket](/docs/how-to/read-the-plate-cost-docket)
- [Set up food safety for one outlet](/docs/tutorials/set-up-food-safety)