---
title: "Link and view allergens and BOMs"
slug: "bc-link-and-view-allergens-and-boms"
description: "Learn how to link allergens to a BOM through ingredients and May contain levels, ensuring safety and compliance in your production processes."
tags: ["BC", "Business Central", "Food", "Task"]
updated: 2026-06-25T09:59:16Z
published: 2026-06-25T09:59:16Z
canonical: "docs.staedean.com/bc-link-and-view-allergens-and-boms"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.staedean.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Link and view allergens and BOMs

You can link allergens to a BOM in two separate ways. The first way is through ingredients. When ingredients contain an allergen, processing those ingredients into another product transfers the allergens to the newly created product. The second way is at the **May contain** level. If production of an item takes place on a machine or in a production room where allergen-containing items are also processed, there is a risk of cross-contamination. You can enter this risk at the BOM level as **May contain**.

You can link allergens to a BOM only at the version level. The results are visible at the BOM level.

Adding allergens to a BOM through ingredients requires you to run the **Rollup Allergens** action. This action looks at all BOM components at all levels, determines whether individual items contain allergens, and rolls them up to their associated BOM level.

> [!NOTE]
> Note
> 
> Only BOM versions with status **Certified** are included in the allergen rollup. BOM versions with status **New** or **Under Development** are not included.

To link an allergen to a BOM version, first set the version to **Under Development**. On the **Navigate** tab in the ribbon, use the **Allergens** button to add allergens of the type **May contain**.

To view allergens linked directly or indirectly to a BOM, use the **Allergen Detail** button. This provides an overview of allergens at the BOM level, created on the spot with all available information at the current time, regardless of the current status of the BOM version.

## Related

- [Perform an allergen rollup](/bc-perform-an-allergen-rollup.md)
- [Allergen management overview](/bc-allergen-management.md)