The meta-analysis showed significantly elevated visfatin levels of GCF, serum, and saliva in the periodontitis population compared with the controls (GCF: SMD = 5.201, 95% CI: 3.886–6.516, Z = 7.75, P < 0.05; Serum: SMD = 7.417, 95% CI: 3.068–11.767, Z = 3.34, P = P < 0.05; Saliva: SMD = 2.683, 95% CI: 1.202–4.163, Z = 3.34, P < 0.05). This evidence concerns the gene NAMPT and periodontitis.