No significant association was observed between the rs12255372 T allele (χ2 = 0.0684, p = 0.79) or the TT genotype (χ2 = 0.372, p = 0.54) of the TCF7L2 gene and obesity in the Cameroonian population. This evidence concerns the gene TCF7L2 and obesity due to melanocortin 4 receptor deficiency.