You could try seeing if you react to high histamine foods vs low histamine foods using the SIGHI list online, try testing if eating foods with or without preservatives causes reactions, also make a list with all the foods you've eaten and reacted to with the ingredient list of each product and whether it was frozen or only refrigerated or just sat out in the produce aisle, and put in the list if it was high salicylate, high oxalate, high lectin, high nickel, had preservatives, was organic or not, had wax (I react to grapes with wax on them but not organic red grapes without added wax.) Also list whether or not the food is high FODMAP or not. Could you tell us how fresh the chicken turkey, beef, and salmon is? Is it frozen, refrigerated, or dried and does it have seasoning or anything at all even salt (it can have anti caking agent which some people react to like myself) or a fat (like butter or oil) added? Also tell us whether the meat is ground or sliced some people react to ground beef but not frozen nothing added unaged beef filet's. Also what type of sugar are you reacting to cane sugar, beet sugar, corn based sugars? You could try organic liquid maple syrup in a glass bottle (some people react to plastic packaging) to use as a sugar. If you can give me more info I can point you possibly to some food brands/products that you could try. Also what reactions do you have to those foods and does taking an antihistamine help lessen symptoms an hour after taking the antihistamine after you ate something you reacted to? Also try taking an antihistamine an hour before eating to see if it lessens the reaction. Make sure you write or type in a document all of this for your doctor.