Why Do Humans Need Protein?

Answer

Humans need proteins for growth and repair of body tissues and for metabolism of hormones and enzymes necessary for various body functions. In addition, proteins help boost the immune system and can be synthesised to produce energy in some special cases.
1 Additional Answer
Humans need proteins for hair and nail health, proper oxygen levels in the body, proper blood clotting, muscle growth and health and for proper metabolism. The largest protein source for humans comes from meats and beans. You can find more info at: proteins-carb-fats.suite101.com
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