Obesity and psoriatic disease (psoriasis, psoriatic arthritis [PsA]): Across 3 cohort studies, obesity increases PsA risk ~1.6–1.7× vs general population, independent of psoriasis severity/duration. Obesity is also associated with lower likelihood of achieving minimal disease activity (MDA; ≥5/7 criteria including joint counts, enthesitis, patient-reported outcomes) after biologic initiation, potentially due to functional limitations and proinflammatory adipose cytokines (IL-6, TNF).