The now-famous anti-jet lag diet developed by Charles Ehret, Ph.D., grew out of extensive animal research at the Argonne National Laboratory. In actuality, it is more than a diet. Daylight, social cues, sleeping patterns, and mental and physical exercise all play a role in making the diet work, Dr. Ehret says.
But the core of the plan involves a 4-day sequence of feast-fast/feast-fast prior to the day of arrival. For these purposes, feast means to eat as much as you want, and fast means to eat lightly.
Here is a sample menu for a fast day.
Breakfast: Two eggs, any style, and one-half piece of lightly buttered toast—214 calories.
Lunch: One chicken breast, skin removed; 1 cup of bouillon; 1/2 cup of low-fat cottage cheese—245 calories.
Supper: One small bowl of pasta, lightly buttered with margarine; one piece of bread, lightly buttered; 1 cup of cooked vegetables (broccoli, string beans, summer squash, or carrots); one alcoholic beverage (optional)—355 calories.
Caffeine is also a major part of the plan. Experiments with laboratory animals, Dr. Ehret says, have shown that caffeine can be used to reset body clocks.
Now let's examine some additional aspects of Dr. Ehret's plan as applied to a westward flight with a 3-hour time change—for example, a trip from New York to San Francisco in which you arrive in San Francisco at 8:30 a.m. local time.