Although B[a]P was declared inappropriate as themarker for the occurrence of PAH contamination in food, it remainsthe most extensively studied PAH due to its high toxic equivalencyfactor (TEF) value and genotoxicity.57 BecauseB[a]P is the most well-studied food-borne PAH andserves as one of the most famous ligands of AhR, we focus on it inthe following section. Here, AHR is linked to pulmonary arterial hypertension.