Acceptability and Tolerance Study of Adult Tube Feed with Food with Food Derived Ingredients.

Inclusion Criteria: * Require a tube feed (taking \>75% of energy needs from their feeding tube) as part of their dietary management for disease related malnutrition * Adults and children requiring an adult enteral formula as assessed by the dietitian. * Patients well-established and stable on a standard formula or currently on Isosource® Junior Mix. * Willingly given, written, informed consent from patient or consultee. For those who lack capacity to provide formal consent for themselves, this may be provided by a personal or consultee in accordance with the Mental Capacity Act. * Willingly given, written assent (if appropriate) on behalf of patients under 18. Exclusion Criteria: * Inability to comply with the study protocol, in the opinion of the investigator * Known food allergies to any ingredients (see ingredients list) * Patients with significant renal or hepatic impairment - Change in current medication or use of additional macro/micronutrient supplements during the study period, unless clinically indicated and prescribed by the investigator (must be recorded in patient case record file). * Participation in another interventional study within 2 weeks of this study.