Although genetics plays a part, obesity is a major reason people develop type 2 diabetes.

CNN: Reversing diabetes is possible

Among the largest underlying components of IWO, in trading today CommVault Systems Inc ( NASD: CVLT) is down about 1.1%, Dril-Quip, Inc. ( NYSE: DRQ) is down about 1.1%, and Seattle Genetics Inc ( NASD: SGEN) is up by about 0.2%.

FORBES: IWO, CVLT, DRQ, SGEN: ETF Outflow Alert

Mr Gibson was using his member's debate to highlight the work undertaken by the Glasgow Epilepsy Genetics Service (GEGS), which has used testing across six genes to give 2, 500 patients definitive diagnosis of their condition.

BBC: Glasgow Epilepsy Genetics Service debate