So the blood sugar levels argument is a load of cr@p is it? Shame they wasted all those months and months on the B52 fleet, airborne 24 hours at a time with crews all on different feeding, sleeping and cockpit lighting scenarios isn't it?
Each group were studied by medics before, during and after flight and throughout the period of the test whilst on the ground. The USAF eventually produced a book two inches thick on the subject.
There is a mass of information available from this and other publications on the subject and a few of the conclusions drawn were: Prior to flying, about two and a half hours, a substantial meal high in protein, during the flight liquid at least every twenty minutes and a high carbohydrate snack every thirty minutes to sustain hydration and sugar levels at the optimum for carrying out the airborne duty without quality of work suffering in any way. Where snacks are not available suitable meals should be eaten at regular intervals.
There are pages and pages on sleeping patterns, recommended and not recommended etc. and an interesting one about cockpit lighting, if not required off for tactical reasons then by keeping the cockpit as bright as possible/reasonable fatigue can be reduced by as much as 75%, something to do with the brain not releasing the natural melatonin because keeping the lights on fools the brain into thinking it is still day.
So for those of you who have come to the stunning conclusion that blood sugar levels of crew are unimportant I suggest you contact your nearest Specialist in Aviation Medicine.