Additionally, 3D‐Exos markedly attenuated the expression levels of the activation marker cluster of differentiation 69 (CD69), interferon‐gamma (IFN‐γ), and Granzyme B in CD8+ T cells in both the tail skin and peripheral blood of vitiligo mice (Figure 4B–D; Figure S2B–D, Supporting Information). Here, GZMB is linked to vitiligo.