Peru balsam (Myroxylon balsamum var. pereirae) is a resinous exudate rich in benzyl benzoate (~65%), benzyl cinnamate, cinnamic acid, and vanillin, which collectively confer antimicrobial and wound-healing properties historically exploited in dermatological preparations.^[1] Despite this utility, sensitisation rates of 4-8% in patch-test populations place it among the most clinically significant contact allergens, and its medicinal use is now restricted in the EU.^[2]