A total of 45 pilots (mean age, 20.8 years; 87% male) from the [University of North Dakota] commercial-aviation program were enrolled in this 14-week repeated-measures crossover trial.
During the first week, participants were randomized to receive 1 of 4 diets (3 full meals and 2 snacks) for 4 days: a diet high in carbohydrates, a diet high in fat, a diet high in protein, or a control diet. After a 2-week “phase-out” period, all pilots then randomly received a different study diet. This process was repeated until all pilots had received all 4 diets.
I haven’t been able to find out much about the high-fat diet. Here are some of the results:
The response time on the Sternberg test of short-term memory was significantly faster for participants who ate the high-fat diet ( P < .05) than for those who ate the protein and control diets, especially at higher memory loads.
With sleep, however, the high-carb diet produced the best sleep.