Balsam of Peru (BOP) is a naturally occurring sticky substance that is harvested by wounding the Myroxylon pereirae tree, found in Central America. It has an odor similar to cinnamon and vanilla, and is renowned for its healing effect on open wounds. It is used in the standard patch test series, as a screening chemical for contact allergy to fragrances.   Notably, it cross-reacts with a number of synthetic fragrances found in perfumes, lotions, cleaning products, etc.  And, as it is a natural substance (containing hundreds of components), there are a number of plant-based foods that also contain varying amounts of these same chemicals.  BOP has been associated with both allergic contact dermatitis and systemic allergic response.  In systemic allergic response ingested foods can trigger a skin reaction.  Some BOP allergic patients react to the vanilloid components, others the cinnamates, while others the coniferins and ferrulic acid.  This quiz reviews some of the potential foods that can trigger reactions from the different components groups.