Nutrients for energy The body needs energy from carbohydrates, proteins, nutrients, fat 3 types: Protein nutrients. Nutrients are protein, large molecules contain the smallest units called amino acids, many types, each about 22 species have different structures. What kind of food has protein, more or less, depending on whether that type of degradable protein and essential amino acids necessary. Protein is a nutrient that the body needs to master in creating various tissue and shell is a component of hemoglobin and serum hormone or smart-immunity of the body. We have approximately 20% of protein body weight.
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