Protein supplements are not essential; they only assist with your current diet program. But the macronutrient itself is essential for life, and it should comprise a significant portion of your daily calorie intake. The daily recommended amount for protein is between 15 and 35 percent of calories consumed. Protein is in every cell of your body, repairing cells and allowing new ones to be created. In terms of physical training, your muscle fibers are cells that contain protein.
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