Most citrin deficiency patients have a strong preference towards foods that are high in protein and fat while disliking carbohydrates and sugary foods. Some patients have also been reported to favor milk. It is completely normal for your child to exhibit these dietary tendencies if he or she has citrin deficiency. It is a natural and necessary adaptation for them to preserve their health. It is generally advisable to allow them to eat what they prefer and in the amount that they wish.