A total of nine loci (TMEM18, GNPDA2, RALYL, NT5C2, OLFM4, FTO, MC4R, QPCTL and ZC3H4) were associated with the outcome and the most strongly associated locus was rs11191560 on NT5C2. Nominal associations observed between the AHEI-2010 score and individual dietary components with BMI levels in our study suggest that a healthier diet may reduce obesity levels. This evidence concerns the gene OLFM4 and obesity due to melanocortin 4 receptor deficiency.