Although SAT-FABP4 mRNA levels were increased in Ob (Ob-NTG plus Ob-HTG) vs. non-Ob groups (p = 0.008), no interaction term was found between obesity and FABP4 expression (OBESITY × FABP4, p = 0.263) in the association between FABP4 and TG levels when data from the three study groups were pooled together. Here, FABP4 is linked to obesity due to melanocortin 4 receptor deficiency.