The iron metabolism gene (Ftl, Fth, Fpn1, and Tfrc) and protein (FTH) levels were higher in the adipocytes and ASCs of the hypertrophic obesity mice than in those of the normal control mice (Figures 5(a), 5(b), and 5(g)). Here, FTL is linked to obesity due to melanocortin 4 receptor deficiency.