Peptides and modern therapies: what they are, and what the evidence shows.

Plain-English guides to peptides, GLP-1s and other modern therapies: what they are, what the research shows, and what they cost, sourced to the primary record. How we verify

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Peptide Basics Oct 12, 2026

What are peptides? A plain-English guide to the science, the approved drugs, and the research peptides

Peptides are short chains of amino acids. Some carry full FDA approval and you already know them, insulin, and GLP-1 medicines like semaglutide. Others are unapproved 'research use only' compounds sold online. Here is the honest landscape, with sources.

Read the guide

Substance directory

Every substance we cover, A to Z: its overview guide and, where one exists, a summary of what people are saying about it.

A to Z

5-Amino-1MQ1 guide
- 5-Amino-1MQ: the 'fat-loss peptide' that is actually a small molecule
BPC-1571 guide
- BPC-157: what it is, the claimed benefits, and what was actually measured
Community summary
CJC-12951 guide
- CJC-1295: two molecules under one name, what each does, and what was actually measured
Community summary
DSIP1 guide
- DSIP (delta sleep-inducing peptide): what it is, how people use it, and what the evidence shows
Community summary
Epitalon1 guide
- Epitalon peptide (epithalon peptide): what it is, what it does, and what the evidence shows
Community summary
GHK-Cu1 guide
- GHK-Cu: the copper peptide that lives two lives, skincare staple and injectable trend
GHRP-21 guide
- GHRP-2 (pralmorelin): what it is, how people use it, and what the evidence shows
GHRP-61 guide
- GHRP-6: what it is, how people use it, and what the evidence shows
Glutathione1 guide
- Glutathione: what it is, how people use it, and what the evidence shows for each form
Community summary
Ipamorelin1 guide
- Ipamorelin peptide: what it is, what it does, and where the claims outrun the evidence
Community summary
Kisspeptin-101 guide
- Kisspeptin-10: what it is, how people use it, and what the evidence shows
Community summary
KPV1 guide
- KPV: what it is, how people use it, and what the evidence shows
Community summary
LL-371 guide
- LL-37 (cathelicidin): what it is, how people use it, and what the evidence shows
Community summary
Melanotan II2 guides
- Melanotan II (MT2): what it is, how people use it, and what the evidence and risks show
- Melanotan 1 vs Melanotan 2: one became a medicine, one never did
MOTS-c1 guide
- The MOTS-c peptide: what the 'exercise in a vial' actually does in mice and in people
Community summary
PEG-MGF1 guide
- PEG-MGF: what it is, how people use it, and what the evidence actually shows
Retatrutide1 guide
- Retatrutide: what it is, what the trials actually measured, and when it might be available
Selank1 guide
- Selank: what it is, what it does, and what the evidence shows
Community summary
Semax1 guide
- Semax: what it is, what it is used for, and what the studies actually cover
Community summary
TB-5001 guide
- TB-500 (TB500, TB 500): what the thymosin beta 4 fragment is, what it does, and what the evidence shows
Community summary
Tesamorelin1 guide
- Tesamorelin: what it is, what it does, and what the evidence supports
Thymosin alpha-11 guide
- Thymosin alpha 1 peptide (TA1): why people use it, and what the trials were actually for
Community summary

By goal

What the community is saying

All Community Insights

Automated, neutral summaries of public social-media discussion about individual peptides. Anecdotal reports, kept separate from our research coverage, not medical advice.

MOTS-c

5 themes from 19 public posts on X

Jul 16, 2026 to Jul 19, 2026

Read the MOTS-c summary

How do people stack MOTS-c with SS-31?
Users commonly discuss pairing MOTS-c with SS-31 and debate whether to run them together or one after the other, with no consensus on sequencing.
What do users say MOTS-c does for energy and mitochondrial function?
Users most often describe MOTS-c as boosting energy and supporting mitochondrial function, though experiences and enthusiasm differ.
Is MOTS-c affected by the FDA compounding decision?
Users note that MOTS-c is among the peptides the FDA's Pharmacy Compounding Advisory Committee was scheduled to review for continued availability through compounding pharmacies.

CJC-1295

6 themes from 17 public posts on X

Jul 13, 2026 to Jul 19, 2026

Read the CJC-1295 summary

What is CJC-1295 and how do people use it?
Users describe CJC-1295 as a growth hormone secretagogue that they commonly stack with Ipamorelin to prompt the body to release more growth hormone.
What is the difference between CJC-1295 with DAC and without DAC?
Users describe the DAC and no-DAC versions of CJC-1295 as effectively different peptides with different half-lives and dosing frequency, and they disagree about which is preferable.
What side effects do people report from CJC-1295?
Users report side effects from CJC-1295 including flushing, disrupted sleep and bloodshot eyes, while one cited trial is described as noting adverse events in most participants, mostly mild.

Epitalon

6 themes from 16 public posts on X

Jul 16, 2026 to Jul 19, 2026

Read the Epitalon summary

What do users say Epitalon is used for?
Users commonly describe Epitalon as a peptide they take for sleep and longevity, often grouping it with other so-called bioregulators.
What do users report about Epitalon and sleep?
Users report mixed sleep experiences with Epitalon, with some describing corrected sleep disruption and others saying their measured REM sleep did not improve.
Do people report vivid dreams on Epitalon?
Some users report unusually vivid or memorable dreams that they attribute to taking Epitalon.

Peptides and modern therapies: what they are, and what the evidence shows.

Featured

What are peptides? A plain-English guide to the science, the approved drugs, and the research peptides

BPC-157: what it is, the claimed benefits, and what was actually measured

Peptide side effects: what the evidence actually shows

How much does peptide and GLP-1 therapy cost in 2026? A sourced price index

Is peptide therapy worth it? It depends entirely on which peptide

Substance directory

A to Z

By goal

What the community is saying

MOTS-c

CJC-1295

Epitalon

More guides

How compounding pharmacies actually work, 503A, 503B, and why the rules differ by drug

How long do peptides stay in your system?

Are peptides legal? What each peptide's status actually means

What is peptide therapy? What the term covers, and how much evidence sits behind each peptide