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Peptide library

Explore 152 peptides by body system, research, and regulatory category. Browse every guide in the directory below.

A guide to peptide research

Explore 152 compounds across eight body systems. Compare research categories, read regulatory context, and follow the original sources. Peppy Care provides this educational library using a source snapshot from October 27, 2026; it is not an independent clinical review or treatment advice.

Peptide questions, answered

What are peptides?

Peptides are chains of amino acids. Some act as signals in the body; others are studied or used in medicines and topical products. The effects and evidence depend on the specific compound, formulation, and use.

Are all peptides FDA-approved?

No. This library includes approved medicines, compounds in clinical trials, unapproved compounds, and cosmetic ingredients. FDA approval applies to a specific product and indication, not to peptides as a group. Compounded medicines are not FDA-approved.

How should I use this peptide library?

Browse by body system or search for a compound. Each guide summarizes its mechanism, research focus, regulatory context, and source references. The catalog is educational and does not establish that a treatment is safe, effective, or offered by Peppy.

Browse all 152 peptide guides

Brain & sleep

Skin & aging

Digestive & weight

Immune & defense

Hormones & metabolism

Bones & muscles

Heart & blood

Sexual & reproductive