* Protein is a molecule: Protein is a type of large molecule that is found throughout the body in many different parts and forms.
* Building block of cells: Protein is made up of smaller units called amino acids. These amino acids are strung together like beads on a chain to form proteins. These proteins then make up many parts of your body, including:
* Muscles: Your muscles are primarily made of protein.
* Bones: While bones are mostly calcium, they also contain protein (collagen) for strength and flexibility.
* Skin: Your skin is made up of many different proteins.
* Hair and nails: These are also made of proteins.
* Enzymes: These proteins help to speed up chemical reactions in your body.
* Hormones: Some hormones are proteins.
* Antibodies: These proteins help your body fight off infection.
So, it's not a specific *part* of the body that makes up protein. Instead, protein is a fundamental building block that is found in many different parts of your body and is essential for almost every function.
