NAMPT and steatosis: Figure 5 summarizes the obtained meta-analysis results. The pooled studies for the analysis assessing serum visfatin levels in simple steatosis patients and moderate to severe steatosis patients demonstrated an overall MD of −0.279 (95% CI −1.843–1.285). No heterogeneity was reported with an I2 = 0% and p-value = 0.409.