Call for Data: Fatty Acid Composition of Bovine Milk

⏰ Deadline: 15 July 2026, 11:59 pm (CET)

The World Health Organization (WHO) invites the submission of global data on the fatty acid composition of bovine milk samples, with a particular focus on butyric acid (C4:0) and trans-fatty acids (TFAs).

Data submissions from all countries are welcome and will support WHO’s work on improving guidance for assessing TFAs in foods.

Scope of requested data

• Fatty acid composition of bovine milk and milk products
• Primary interest: whole milk (bulk tanker or retail-derived)
• Anhydrous milk fat and whole milk powder (if available)

Analytical requirements

Fatty acid composition should be determined using one of the procedures described in the full call for data.

How to submit data

Please use the dedicated spreadsheets for calculation and reporting, and send completed spreadsheets and GC chromatograms to:

📧 yamamotor@who.int

We appreciate your support in sharing this call with relevant laboratories, researchers, and institutions.