§ Mr. Sanders
To ask the Secretary of State for Health what studies his Department has(a) commissioned and (b) evaluated on the clinical effectiveness of (i) animal-based insulins and (ii) other insulins; and if he will make a statement. [R] 
§ Ms Rosie Winterton
All authorised insulins, whether human insulin or animal insulin, have been demonstrated to be efficacious in people with diabetes mellitus. As part of the licensing approval process for any medicinal product, including insulins, the applicant has to provide evidence that the product meets appropriate standards of quality, safety and efficacy. This will include clinical trail data in patients with diabetes. The decision to use one or other of the insulins rests with the physician in consultation with the patient.
The Medicines and Healthcare products Regulatory Authority does not commission separate studies.