From Kathryn Latham
In your article on the “slumber gene”, the “slumber secrets” include a claim that “meals with a low glycaemic index (GI) might help stave off diabetes” (15 October, p 14). This is not accurate. A low-GI diet may help stave off most cases of type 2 diabetes but not type 1 diabetes. Type 2 diabetes is influenced by diet, lifestyle factors and in some cases genetics, while type 1 is an autoimmune disease and cannot be prevented by eating a low-GI diet.
Loughborough, Leicestershire, UK
