Here is a quote from Bernstein(I follow Berenstein’s system):
Protein doesn’t raise sugar anywhere near as much as carbohydrate; however it can still raise blood sugar. Protein raises blood sugar by two mechanisms. The first mechanism is gluconeogenesis, which is the conversion of a small percentage of the protein to glucose. It converts to about 2 grams of glucose per ounce of protein, a very small percentage. An ounce is 28.5 grams. If you eat a 12-ounce steak, those grams can add up. The other mechanism by which protein raises blood sugar is the incretin effect, which in my books, I call the “Chinese Restaurant Effect.” Just distending your gut with anything will raise blood sugar, even a handful of pebbles, if you are a severe diabetic like me. So, just the presence of that steak in your gut will distend the gut, causing you to release hormones that will raise blood sugar.
Does anyone use dual boluses with injections to deal with protein (similar to the dual-wave technique with pumps)? I have tried it a couple of times and it does seem to work.