That usually means it was overheated somewhere in the supply chain. Aspartame starts to break down around 30C.[1] So it doesn't take much. [1] https://www.mdpi

That usually means it was overheated somewhere in the supply chain. Aspartame starts to break down around 30C.[1] So it doesn't take much. [1] https://www.mdpi.com/2673-9976/40/1/35 https://www.mdpi.com/2673-9976/40/1/35