GDF15 and dementia: Similarly, growth differentiation factor 15 (GDF15)—also known as macrophage inhibitory cytokine 1 (MIC1)—has been identified as an anti‐inflammatory cytokine and a marker of immune‐mediated stress response that increases with age, and in the context of cellular senescence and certain age‐related diseases (e.g., cardiovascular disease and dementia) (Evans et al. 2024; Walker, Chen, et al. 2023).