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.
Including 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.Just because a food has zero carbs, doesn't automatically mean that it's healthy. Choose lean cuts of meat that have 7 grams of saturated fat or less.Good choices include sirloin, white-meat chicken, fish and shellfish.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.