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Difference between carbohydrae and protein

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NutritionNutrition BasicsNutrition Facts

What Are the Differences Between Carbohydrates and Proteins?

By Suzanne Fantar

Nutrients provide your body with energy as well as building material to help your body to grow, maintain itself and heal. Carbohydrates and proteins belong to the macronutrient group, which is a class of nutrients your body needs in significantly greater quantities, than nutrients such as as vitamins or minerals. Beyond their common classification, however, carbohydrates and proteins differ slightly in their chemical composition, as well as in their general function and dietary requirements.

Grilled Chicken Breast with Vegetable Salad

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Component Molecules

Spaghetti al pomodoro!

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Proteins and carbohydrates contain carbon, hydrogen and oxygen molecules, although in different proportions. For instance, data from the Michigan State University Chemistry Department indicate that approximately 50 percent of all the molecules in carbohydrates are oxygen molecules, while proteins typically contain 15 to 25 percent oxygen. Also, a key feature of proteins is their relatively high nitrogen content, compared to carbs. Indeed, the nitrogen content of proteins typically ranges from 15 to 25 percent, while carbs range from zero to less than 5 percent of nitrogen.

Basic Structural Units

Chinese mix vegetables with rice and shrimp

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Component molecules assemble in different ways to form the basic units of carbs and protein. In carbs, that basic unit is a saccharide, another word for sugar. Monosaccharides are single-unit sugars, the simplest carbs. These can link up with each other to form two-unit sugars -- also known as disaccharides -- or polysaccharides, which can be hundreds of units in length. In contrast, amino acids are the basic units of proteins. Approximately 20 types of amino acids act as your body's primary protein building blocks. They can assemble in very complex ways to form helices, pleated sheets, globules or even multi-unit protein structures.