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.
Although most dairy products contain carbohydrates due to a naturally occurring sugar called lactose, most cheeses are surprisingly carbohydrate free. Varieties such as cheddar, Parmesan, Muenster, provolone, Camembert, blue and cream cheese contain zero carbs.Cheeses can provide valuable nutrients in your diet such as protein and calcium. Choose light, low-fat or 2-percent milk cheeses if you are counting your calories.ncluding zero-carbohydrate foods in your diet may be easier than you think when you consider the variety of foods that are carb free. Most meats and eggs are carbohydrate free. Choose from beef, veal, pork, poultry, seafood, game meats and organ meats.