Don't be afraid of high altitude, but be well informed and take precautions. Our experience of over many years dealing with high altitude disease will prove most useful to you. This advice is mainly for travelers to high altitude and not necessarily for mountain climbers, although similarities exist. It is also useful for altitudes in other places or cities. It is important to mention this because we should not underestimate psychological factors.
Exaggerated fear constitutes stress and therefore a great loss of energy.
Don't waste your energy, it is fundamental for adaptation. An explanation of exactly how fear acts on an organism would be very complicated, but that fear can produce a fast pulse, just as if you were exercising is a good example. Your organism is immune to the bacteria and viruses that surround you in your usual habitat and not to those of a new environment. You should not ingest unknown foods in great amounts for the first time upon arrival. Digestive enzymes develop a specific capacity and function for each type of food.