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en.wikipedia.org/wiki/Food_energy

Food energy is chemical energy that animals (including humans) derive from food through the ... Some diet components that provide little or no food energy, such as water, ... Fats and ethanol have the greatest amount of food energy per gram, 37 and ... All the other nutrients in food are noncaloric and are thus not counted.

www.answers.com/Q/Which_nutrient_provides_the_highest_number_of_calories_per_gram

Which essential nutrients have the highest calories per gram? fat ... Fat is the nutrient that provides the highest number of calories (9 per gram). 2 people found  ...

healthyeating.sfgate.com/gives-energy-per-gram-fat-protein-carbohydrates-8319.html

The amount of energy you'll get from carbohydrate, protein and fat is measured in calories per ... Other factors, such as your activity level and diet, impact which macronutrient is used for energy. ... Carbohydrates have four calories per gram.

www.livestrong.com/article/517835-what-gives-the-most-energy-per-gram-fat-protein-or-carbohydrates

Oct 20, 2013 ... Protein and carbohydrates each contain 4 calories per gram. Fat -- the most energy dense of the nutrients -- contains 9 calories per gram.

www.livestrong.com/article/500178-do-protein-carbohydrates-or-fats-have-the-most-calories-per-gram

Oct 27, 2015 ... Many foods are combinations of two or three different... ... Protein is a nutrient found in foods such as meat, fish, seafood, chicken, milk, eggs, soy products, yogurt, ... Just like protein, carbohydrates provide 4 calories per gram.

www.quora.com/Which-contains-more-calories-per-gram-carbohydrates-fats-sugar-or-protein

Fat is the leader with 9 calories per gram. But with a low fat high carb diet, which was ... Many people still are on this type of diet: high amounts of sugary drinks, lots of bread, muffins, pasta, pizza ... (Also note that sugar is not a separate nutrient.

www.nutristrategy.com/nutrition/calories.htm

Caloric content of fat, protein, carbohydrates and alcohol. Calories are ... The number of calories in a food depends on the amount of energy the food provides.

woman.thenest.com/gives-energy-per-gram-fat-protein-carbohydrates-1389.html

... functions of metabolism. Additionally, many compounds, such as fat-soluble vitamins, are stored in fatty tissue. ... Carbohydrates, like protein, provide four calories per gram. Carbohydrates are ... Nutrients with the Highest Energy Density.

woman.thenest.com/highest-caloric-density-proteins-fats-carbs-11887.html

Caloric density refers to the amount of energy, or calories, contained in a given weight of food ... Carbs and protein each provide four calories per gram, while fat is more ... Nutrition,” protein has the greatest satiating ability of any macronutrient.

www.merckmanuals.com/home/disorders-of-nutrition/overview-of-nutrition/carbohydrates,-proteins,-and-fats

All three provide energy (measured in calories), but the amount of energy in 1 gram (1/28 ounce) differs: 4 calories in a gram of carbohydrate or protein.