Caffeine is another powerful influence on the body clock. If you do not regularly consume caffeinated beverages, use of caffeine during the StopJetLag program is not recommended; proper use of the other know influences will trigger the desired body clock change. If you do drink caffeine regularly, it is very important that you follow the caffeine recommendations found in your StopJetLag Plan. Decaffeinated beverages can be used at any point during the StopJetLag regime.
The facts about what caffeine actually does to your biochemistry may be surprising. Caffeine causes different reactions depending on the time of the day it is ingested, but in general it causes a short period of stimulation soon followed by a drop in your glycogen (blood sugar) level. In other words, caffeine can actually rob your body of available energy reserves. The program takes into consideration the important variations in its effect on your body clock depending on when it is consumed, and for this reason some of the instructions for its use may seem odd.
The effective use of caffeine for resetting the body clock is maximized if you can avoid using sugar (sugar substitutes are OK) or cream in your beverages and try not to eat anything sweet at the time you have the caffeine. Also, proper timing and minimal use of caffeine in the days prior to a time zone shift will increase your sensitivity to its 'trigger' effect during the change-over.
Be aware that caffeine occurs not only in coffee, tea, colas, and chocolate, but in significant amounts in over-the-counter drugs such as Anacin, Excedrin, Midol and Dristan, plus weight control aids, stimulants (i.e., NoDoz and Vivarin) and diuretics. See the Caffeine Chart the comes with your StopJetLag Plan for details on these product's caffeine content.