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.
Most condiments contain carbohydrates. Likewise, salad dressings and mayonnaise often have some carbs because they may use carb-containing ingredients, such as certain vinegars, herbs, sugar, high-fructose corn syrup, honey, mustard, dairy products, emulsifiers, or other ingredients.iet Advisor. When deciding to follow a low carb diet, dieters often want to know what foods have no carbs. For those who count carbs, foods that have low or zero carbs are precious commodities.