It may be that the time you eat protein impacts on the blood sugar level in different ways according to July 2020 research by the University of Bath. Eating protein at night may have a higher impact on blood sugars levels the following morning.
Eleanor Smith, who presented the work, said: "Future research will look at whether this applies to older and overweight people who tend to have more problems controlling their blood sugar levels. It would also be interesting to know to what extent our findings are due to eating at an unusual time or the type of protein consumed."