[37] in a nonrandomised, single‐treatment study of 44 subjects with obesity, who received a hypocaloric diet for 12 weeks, reported that body weight, BMI, waist circumference and fat mass improved without significant differences between different FTO genotypes ([TT] vs. [TA + AA]) of rs9939609 polymorphism. The gene discussed is FTO; the disease is obesity due to melanocortin 4 receptor deficiency.