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Module 1 — Peptides: What They Are

Peptides are short chains of amino acids. They act as signaling molecules that tell cells how to behave — for example, to repair tissue, modulate inflammation, or influence hormone pathways. Some are used topically, others systemically, and many are currently studied in research settings.

Learning goals: know the definition, key uses (repair, signalling), and difference between peptides and full proteins.

Quick quiz — 5 questions

1. A peptide is:
2. Peptides commonly act as:
3. Compared to proteins, peptides are generally:
4. Peptides are made of:
5. Which is true about peptide applications?
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