Foods for invalids and infants for medical purposes, including medicinal food supplements for nutritional purposes, nutritional supplements for medical use, dietary food preparations for medical use, dietary food supplements for medical use, dietary foods for medical use, dietary substances for infants and invalids, dietetic beverages adapted for medical purposes, fortifying foodstuffs adapted for persons with special dietary requirements, health food supplements for persons with special dietary requirements, invalids' foods for persons with special dietary requirements due to a medical condition, medicated foodstuffs for persons with special dietary need due to a medical condition, mineral dietary supplements for humans, protein foods for dietetic purposes for persons with a disorder of the digestive system, protein substitutes for medical use for the management of metabolic disorders, including phenylketonuria, maple syrup urine disease and tyrosinaemia, fortifying compositions for medical use for the management of malnutrition