Peptide

A peptide is like a special kind of building block that makes up living things. It's like a tiny little piece that makes up protein, which is another important thing in our bodies. Just like how you can build different things with toy blocks, our bodies can build different things out of peptides. There are lots and lots of different peptides, and each one has a special job to do in our body. Some help us digest our food, others help us fight off germs, and some even help us feel happy or sleepy. Think of it like having lots of different tools in our toolbox. Each one has a job to do, and all of them working together help us stay healthy and happy.