Peptide guides, dosing breakdowns & protocols
Plain-English deep-dives on what each peptide does, how it's used, and what the research actually shows. New posts every week. For the full reference, grab the PeptideRef Handbook.
- Sexual Health5 min read
PT-141 (Bremelanotide): The Melanocortin Peptide for Desire
PT-141 is a melanocortin agonist that acts centrally in the brain — the only approved peptide that targets desire rather than blood flow.
Read guide - Nootropic & Longevity6 min read
Epithalon: The Telomerase-Activating Longevity Peptide
Epithalon is a synthetic tetrapeptide modeled on epithalamin, a pineal-gland extract. It's the most-studied longevity peptide in animal models.
Read guide - Cosmetic & Skin5 min read
GHK-Cu: The Copper Peptide for Skin, Hair, and Wound Repair
GHK-Cu is a tripeptide-copper complex naturally present in human plasma. It declines with age — which may be exactly why supplementation helps.
Read guide - Growth Hormone7 min read
Ipamorelin + CJC-1295: The Classic Growth Hormone Pulse Stack
Ipamorelin is a selective GHRP. CJC-1295 is a GHRH analog. Together they trigger a synchronized GH pulse without cortisol or prolactin spillover.
Read guide - GLP-1 / Metabolic6 min read
Tirzepatide: The Dual GIP/GLP-1 Peptide That Outperforms Semaglutide
Tirzepatide is the first dual-agonist approved for weight loss, hitting both GIP and GLP-1. It outperforms semaglutide by about 6 percentage points in head-to-head trials.
Read guide - GLP-1 / Metabolic7 min read
Semaglutide: The GLP-1 Peptide Behind 15% Body-Weight Loss
Semaglutide reshaped metabolic medicine. It mimics the gut hormone GLP-1 to slow gastric emptying, suppress appetite, and improve glycemic control.
Read guide - Healing & Recovery6 min read
TB-500 (Thymosin Beta-4): Soft Tissue Repair & Flexibility
TB-500 mimics the active region of Thymosin Beta-4, a naturally occurring repair protein. It's the long-loading counterpart to BPC-157.
Read guide - Healing & Recovery7 min read
BPC-157: The Gut-Derived Peptide for Tendon, Joint & GI Repair
BPC-157 is a 15-amino-acid fragment of a protective compound found in stomach acid. It's the most studied peptide for soft-tissue and gut recovery.
Read guide - Guide6 min read
What Are Peptides? A Plain-English Guide to How They Work
Peptides are the body's signaling molecules. Learn what they are, how they differ from proteins, and why researchers use them for healing, fat loss, and longevity.
Read guide
Want every protocol in one place?
The PeptideRef Handbook bundles reconstitution charts, dosing tables, and safety notes for 30+ peptides into one printable PDF.
See the Handbook