Is aspartame more polar than caffeine?

Yes, Aspartame is more polar than caffeine. Aspartame, being a dipeptide composed of amino acids, contains multiple polar functional groups, such as carboxyl and amine groups, which increase its overall polarity. In contrast, caffeine, while also polar due to its nitrogen atoms, has a more hydrophobic structure and fewer polar functional groups. Thus, aspartame's molecular structure contributes to its higher polarity compared to caffeine.