High-Protein Foods (It takes more oxygen to process high protein foods, so keep them to a minimum when you are acclimating to a higher altitude.) * Beef and pork * Chicken and turkey * Fish Caffeine * Chocolate * Coffee * Tea Alcohol * Avoid all alcohol when adjusting to a higher altitude. It will dehydrate you. Processed Foods & High-Sodium Foods * Canned soups * Deli meat * Frozen meals * Hot dogs * Packaged foods such as crackers, cookies, chips, etc. * Pepperoni, salami, and other cured meats