GPT and pulmonary arterial hypertension: Single-exposure (Figure 8), evaluated while holding the rest of the mixture at reference levels, supported these patterns: phthalate metabolites (e.g., mono-(2-ethyl-5-hydroxyhexyl)) were positively associated with ALP and FLI [52,53], PFAS (e.g., PFNA) tracked higher ALT and FLI [54], and PAH biomarkers (e.g., 1-hydroxyphenanthrene, 3-hydroxyfluorene) aligned with elevated ALT, GGT, total bilirubin, and FLI, while metals showed mixed directions [55].