A substance, both a hormone and neurotransmitter, secreted by the adrenal medulla and the nerve endings of the sympathetic nervous system to cause vasoconstriction and increases in heart rate, blood pressure, and the sugar level of the blood. Also called levarterenol, noradrenalin. norepinephrine.
Foods that only contain protein, fat or both -- and are carb-free -- are few and far between. Most foods contain at least some carbohydrates. However, plant-based oils, other pure fats -- like butter and margarine -- meats, poultry, seafood and eggs are the best sources of carb-free foods.
So, without further delay, here are common types of foods that you may want to include in your diet that contain exactly zero carbohydrates: Meat such as beef, fish, chicken, seafood, and eggs is carbohydrate free. So the following are foods with no carbs: 1  Cow beef and veal. 2  Pork. 3  Lamb. 4  Fowl-turkey, chicken, duck, goose, cornish hen, quail, etc. 5  Seafood-mollusks such as clams and oysters. 6  Seafood-shellfish such as lobster, shrimp, squid, and crab.