For diabetics, one of the most important aspect of a food is it's impact on blood glucose levels rather than it's sugar content. Originally, diabetics were told to avoid sugar, but it is not so clear cut. Blood glucose response depends on the type of sugar, and complex carbohydrate can impact blood glucose levels as much as simple sugars. If a food contains protein, fat and dietary fibre as well as carbohydrate these other nutrients will lower the blood glucose response of a food. One Square Meal has a low glycaemic index, which means the energy it provides raises blood glucose slower, to a lesser degree and maintains blood glucose levels for longer than a high or medium Glycaemic Index food, so it should be an appropriate food for a diabetic.
That said, we think it's important if you are diabetic that you review the ingredients list and nutrition information panel in order to make the appropriate choice for your specific condition. If at all in doubt we suggest you seek advice from your medical / nutritional advisor.