Muscle tissue in the human body is the largest reservoir of amino acids, and most bodily tissues are frameworks of protein fibers synthesized by amino acids. Each gram of protein contains 4 calories. Protein is an essential macronutrient comprised of organic molecules called amino acids. The same goes for water.Ĭarbohydrates and alcohol are not considered "essential" macronutrients for humans since the body can create glucose and ethanol endogenously from other substrates.īelow, you can learn more about protein, carbs, and fat and how these macronutrients work in the body: Protein In other words, we must consume fat and protein regularly to survive. However, macronutrients play expansive roles that go well beyond their energy provisions in the body.įor example, fat and protein are biologically "essential" for humans since they provide fatty acids and amino acids, respectively, that are necessary for cellular integrity and synthesizing and repairing body tissues. The primary function of macronutrients, aside from water, is to provide energy (calories) for life-sustaining processes. For humans, these nutrients are water, fat, carbohydrate (carbs), and protein. Macronutrients (aka "macros") are nutrients that a living organism needs in relatively large amounts for proper biological function. This causes your net caloric expenditure to rise, enabling you to safely lose weight in the process. However, if you raise your TDEE and begin exercising, your body will begin metabolizing additional macros, like fat, to provide the necessary energy for your workout. (Construction worker, Athlete)įor example: if you're sedentary and your goal is to burn fat, your daily macro burn goal may be above average.
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