Ideally, RUTF storage and use are typically 30 °C, as much of the food is used in sub-Saharan Africa and south Asia. From some journals, UNICEF encourages the testing of oil separation in RUTF at 40 °C, which is a condition that accelerates the oil separation, and provides information as to whether the RUTF will meet their shelf-life specification.

Hi Maha, thank you for your question. Technical specifications from UNICEF (2022) state RUTF is best stored below 30°C - https://www.unicef.org/supply/media/16636/file/S0000248-RUSF-Specification.pdf

I have also linked below previous en-net conversations on RUTF spoilage due to extreme temperatures that might be of interest to you.

https://www.en-net.org/question/916.aspx

https://www.en-net.org/question/3722.aspx