Which of the following is NOT classified as a nutritional disorder?

Von Hippel Lindau is not classified as a nutritional disorder because it is a hereditary genetic condition characterized by the development of tumors and cysts in multiple organs. This syndrome is caused by mutations in the VHL gene, which is completely different from the causes of nutritional disorders.

In contrast, anorexia nervosa is an eating disorder defined by an extreme fear of gaining weight and severe restriction of food intake, leading to significant weight loss and various health complications. Kwashiorkor and marasmus are both severe forms of malnutrition resulting from insufficient protein and calorie intake, manifesting primarily in children.

Thus, the correct identification of Von Hippel Lindau as not a nutritional disorder reflects an understanding of the distinction between genetic disorders and those directly related to dietary deficiencies.