Maybe you can only estimate, here for your reference
from the book ``Cooked: A Natural History of Transformation''
The glycemic index of whole grain Wonder bread (around 71) is essentially the same
as the Classic Wonder bread (73) (By comparison, the GI of whole grain bread made with stone-ground flour is only 52).
The glycemic index of whole grain Wonder bread (around 71) is essentially the same
as the Classic Wonder bread (73) (By comparison, the GI of whole grain bread made with stone-ground flour is only 52).