21 Studies in Peru have shown that natives of places located over 3600 meters above sea level have atrophic chronic gastritis and intestinal metaplasia associated with Helicobacter pylori infections more frequently than do inhabitants of sea level regions. The greater susceptibility of the gastric mucosa at high altitudes is related to nutritional factors including chronic deficits of the ascorbic acid and carotenoids, to environmental factors including consumption of large amounts of salt and nitrites, and physiological factors.
Estudios en Perú han mostrado que en nativos de las grandes alturas mayores a 3.600 msnm la gastritis crónica atrófica y de la metaplasma intestinal asociada a la infección por Helicobacter pylori son más prevalentes comparados con habitantes de zonas a nivel del mar. La mayor susceptibilidad de la mucosa gástrica en las grandes alturas está relacionada con factores nutricionales déficit crónico del consumo de ácido ascórbico, carotenoides, ambientales alto consumo de sal, de nitritos y fisiológicos.