The American Diabetes Association recommends choosing whole grain bread or 100 percent whole wheat bread instead of white bread.
It says the worst breads for someone with diabetes are made with refined carbohydrates, such as white flour.
Processing grains to make white flour softens the texture, but it also strips away fibre, vitamins, and minerals and results in a higher glycaemic index.
White bread is made from highly processed white flour and added sugar.
Eating bread, bagels, and other refined-flour foods has been shown to significantly increase blood sugar levels in people with type 2 diabetes.