Don't drink the local milk (it made me sick more than once), buy imported milk from the supermarkets that have imports, such as Metro. Be aware that frozen goods are not shipped in refrigerated trucks so have often thawed and refrozen, even with places like Metro. As a result ice cream was often found to be inedible. Bread, in the region I was in, is often sweetened and tastes terrible as a result, but normal bread can be found in speciality shops. Don't judge a restaurant by how fancy it looks, note which ones are popular with the locals. If dinning out with suppliers don't show interest in something you won't eat, they mistake you horror as desire and you will find it ordered for you. Likewise you will likely be offered the menu to make choices, it is a sign of respect but you only need to order a couple of things and leave the rest to them, just got for the safe choices you recognise and you can wing it for the rest of the meal.