Free guide · 2026
Free14-pageForums contradict each other and sellers oversell. This free 14-page guide explains what 26 popular peptides are used for, the basics beginners ask about, and how to judge product quality.
The 26 peptides in the guide
What researchers are studying each one for, and a grade for how strong the evidence is behind each use.
Weight & metabolism
A once-weekly GLP-1 receptor agonist, studied in large phase 3 and cardiovascular outcome trials.
What it's being studied for
Weight & metabolism
A dual GIP/GLP-1 receptor agonist. Activates two appetite-hormone receptors; produced more weight loss than semaglutide head-to-head.
What it's being studied for
LY3437943 · Triple G agonist
Weight & metabolism
Lilly's once-weekly triple-hormone agonist. Phase 3 trials report about 20% average weight loss; not yet FDA-approved.
What it's being studied for
Body Protection Compound-157 · PL 14736
Recovery research
A 15-amino-acid peptide studied mainly in rats for tendon, muscle and gut repair. One small, uncontrolled human case series has been published.
What it's being studied for
Thymosin beta-4 fragment
Recovery research
A synthetic fragment of thymosin beta-4, a tissue-repair protein. The parent protein has human trials; TB-500 itself does not.
What it's being studied for
Copper tripeptide-1 · Glycyl-L-histidyl-L-lysine copper
Skin & longevity
A three-amino-acid copper peptide. Small cosmetic studies support topical use; injectable use has no human trials.
What it's being studied for
CJC-1295 with DAC · DAC:GRF
Hormone research
A lab-made GHRH analogue that raises growth hormone and IGF-1 for days. Development stopped in 2006; no outcome trials.
What it's being studied for
NNC 26-0161
Hormone research
A five-amino-acid ghrelin mimic that triggers growth hormone pulses. Its one phase 2 program did not beat placebo.
What it's being studied for
TH9507
Hormone research
The only FDA-approved GHRH analogue. Reduces belly (visceral) fat in people with HIV-associated lipodystrophy.
What it's being studied for
Geref
Hormone research
The first 29 amino acids of GHRH. Once FDA-approved for children with GH deficiency; the US product was discontinued in 2008.
What it's being studied for
Mitochondrial open reading frame of the 12S rRNA-c
Skin & longevity
A 16-amino-acid peptide encoded in mitochondrial DNA. Mouse studies show metabolic benefits; no human treatment trials are published.
What it's being studied for
Epithalon · Epithalone
Skin & longevity
A four-amino-acid peptide promoted for telomeres and longevity. Evidence comes almost entirely from one Russian research group.
What it's being studied for
TP-7 · Selank acetate
Brain & mood
A seven-amino-acid peptide registered in Russia as an anxiety treatment. Not approved in the US; evidence is small and mostly Russian-language.
What it's being studied for
MEHFPGP
Brain & mood
A Russian nasal peptide based on a fragment of ACTH, used there for stroke and cognition. Not approved in the US.
What it's being studied for
Bremelanotide
Melanocortin research
FDA-approved for one prescription use in premenopausal women. Acts on brain melanocortin receptors.
What it's being studied for
MT-II · MT2
Melanocortin research
An unapproved melanocortin peptide that darkens skin and has other systemic effects. Linked to case reports of changing moles and melanoma.
What it's being studied for
Anti-Obesity Drug 9604 · hGH fragment 176-191 analogue
Weight & metabolism
A growth hormone fragment developed as a fat-loss drug. Worked in obese mice; human development stopped. Not FDA-approved.
What it's being studied for
Lys-Pro-Val
Immune & gut
A three-amino-acid fragment of α-MSH that reduced colitis in mice. No human trials published.
What it's being studied for
Thymalfasin · Zadaxin
Immune & gut
An immune-signalling peptide approved in several countries outside the US. A 2025 phase 3 sepsis trial found no mortality benefit.
What it's being studied for
Elamipretide · Forzinity
Skin & longevity
A mitochondria-targeting peptide. FDA granted accelerated approval in 2025 for Barth syndrome, a rare genetic disease.
What it's being studied for
CagriSema (with semaglutide) · NN9838
Weight & metabolism
An amylin-mimicking peptide that slows stomach emptying and curbs appetite. In the 3,417-person REDEFINE 1 trial, it was tested alone and paired with semaglutide.
What it's being studied for
BI 456906
Weight & metabolism
A weekly injection that acts on GLP-1 and glucagon receptors. In SYNCHRONIZE-1 (725 adults, 76 weeks), weight fell about 13% on the higher dose vs 5% on placebo.
What it's being studied for
IBI362 · LY3305677
Weight & metabolism
A weekly GLP-1 and glucagon dual agonist from Innovent and Lilly. In GLORY-1 (610 adults in China), weight fell up to about 15% at 48 weeks.
What it's being studied for
Delta sleep-inducing peptide · Emideltide
Brain & mood
A small brain peptide first isolated in 1977. Most human studies are small 1980s–90s trials that FDA called difficult to interpret.
What it's being studied for
Cathelicidin LL-37
Immune & gut
A peptide the body makes to fight microbes. Applied to leg ulcers, it beat placebo in a small trial, but a larger 148-person trial found no overall benefit.
What it's being studied for
KP-10 · Metastin 45–54
Hormone research
A fragment of the hormone that switches on the reproductive axis. In small human studies it raises LH and testosterone within hours.
What it's being studied for
Grades are editorial summaries of published research, as of October 2026. The full guide adds safety notes, half-life, regulatory status and sources for every peptide.
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What's inside
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Straight talk
Most "protocols" online skip the basics. This guide starts with what each peptide is being studied for and what the research actually shows, so you can ask better questions and judge what you're told.
Why trust it
Peptide Field Guide doesn't sell peptides, take product ads or link to vendors.
Claims trace back to FDA records, peer-reviewed studies and clinical trial registries.
Every use is scored on its own, so a strong result never props up a weak claim.
2026 edition, reflecting FDA status and research as of this year.
Questions
Yes. Enter your email and we'll send the full 14-page PDF to your inbox within minutes. No trial, card or upsell required.
No. It's an education resource: what each peptide is being studied for, how strong the evidence is, and its regulatory status. Any decision about a treatment belongs with a licensed clinician.
That's exactly who it's for. Everything is in plain English, with pictures, worked examples and a grade key on every page.
Semaglutide, tirzepatide, retatrutide, AOD-9604, BPC-157, TB-500, CJC-1295, ipamorelin, tesamorelin, sermorelin, GHK-Cu, MOTS-c, epitalon, SS-31, selank, semax, PT-141, melanotan II, KPV, thymosin alpha-1, cagrilintide, survodutide, mazdutide, DSIP, LL-37 and kisspeptin-10. A purity glossary explains what a clean lab report shows.
It usually arrives within two minutes. Check your Promotions or Spam folder, and search for "Peptide Field Guide." Still nothing? Sign up again and double-check the spelling of your email.
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