BDNF and bulimia nervosa: For example, the AA genotype was linked with a higher risk of being overweight in children and adolescents (Martínez-Ezquerro et al., 2018) and a higher risk of anorexia and bulimia nervosa than the c.196G BDNF allele carriers in five European populations from France, Germany, Italy, Spain and the UK (Ribases et al., 2004).