Research Library

Peptide Research Database

Evidence-based summaries for 25+ research peptides — mechanisms, research areas, storage, and availability.

29 peptides

Ipamorelin

Ipamorelin acetate

A selective growth hormone secretagogue and ghrelin receptor agonist. Considered one of the cleanest GHS peptides due to its minimal effect on cortisol and prolactin.

Half-life

~2 hours

711.9 Da

Growth Hormone SecretagoguesIn Stock

Sermorelin

GHRH(1-29) · GRF 1-29 NH2

A synthetic analogue of the first 29 amino acids of endogenous growth hormone-releasing hormone (GHRH). Directly stimulates the pituitary to produce and secrete GH.

Half-life

10–20 minutes

3357.9 Da

Growth Hormone SecretagoguesIn Stock

Tesamorelin

TH9507 · Egrifta (pharmaceutical form)

A stabilized analogue of GHRH with a trans-3-hexenoic acid modification that extends its half-life. Notable for its research in visceral adipose tissue reduction.

Half-life

~26 minutes (longer than sermorelin due to DPP-IV resistance)

5135.8 Da

Growth Hormone Secretagogues

CJC-1295

CJC-1295 with DAC · Drug Affinity Complex-GHRH

A long-acting GHRH analogue that covalently binds to albumin in vivo via a Drug Affinity Complex (DAC), extending its half-life from minutes to over a week.

Half-life

6–8 days (with DAC) / ~30 min (without DAC)

3647.3 Da (with DAC)

Growth Hormone Secretagogues

GHRP-2

Growth Hormone Releasing Peptide-2 · Pralmorelin

A synthetic hexapeptide GHSR agonist that strongly stimulates GH release. Also increases appetite via ghrelin receptor activation in the hypothalamus.

Half-life

15–60 minutes

817.9 Da

Growth Hormone Secretagogues

Hexarelin

Examorelin · EP-23905

One of the most potent synthetic GHSR agonists. Notable for strong GH release and significant research interest in cardiac protection independent of GH effects.

Half-life

~30 minutes

887.0 Da

Weight ManagementIn Stock

Retatrutide

LY3437943 · GLP-3 agonist

A first-in-class triple receptor agonist targeting GLP-1, GIP, and glucagon receptors simultaneously. Demonstrated the highest weight loss percentages in Phase 2 clinical trials of any peptide to date.

Half-life

~6 days (facilitates once-weekly dosing)

~4700 Da

Weight Management

Semaglutide

Ozempic (weekly) · Wegovy (weight loss)

A highly modified GLP-1 receptor agonist with a C18 fatty diacid modification enabling once-weekly dosing. One of the most extensively studied metabolic peptides.

Tirzepatide

Mounjaro (T2D) · Zepbound (obesity)

A dual GLP-1/GIP receptor agonist. In clinical trials, achieved 20–22% average weight loss at the highest doses, establishing a new benchmark for pharmacological obesity treatment.

AOD-9604

Advanced Obesity Drug · hGH Fragment 176-191

A modified fragment of the C-terminus of human growth hormone (amino acids 176–191) that retains fat-mobilizing properties without the growth-promoting or diabetogenic effects of full hGH.

Half-life

~30 minutes

1817.1 Da

Recovery & RepairIn Stock

BPC-157

Body Protection Compound-157 · PL-10

A 15-amino acid peptide derived from a protective protein found in gastric juice. Extensively studied for accelerated healing of tendons, ligaments, muscles, and gut tissue in animal models.

Half-life

~4 hours

1419.5 Da

Recovery & RepairIn Stock

TB-500

Thymosin Beta-4 fragment · Tβ4 (17–23)

A synthetic version of the naturally occurring actin-sequestering protein thymosin beta-4. Promotes tissue repair, reduces inflammation, and enhances cell migration.

Half-life

~2–3 hours

~895 Da (fragment) / 4963 Da (full Tβ4)

Immune & Antiviral

Thymosin Alpha-1

Tα1 · Thymalfasin

A 28-amino acid peptide derived from prothymosin alpha. One of the most researched immunomodulatory peptides, used clinically in multiple countries for hepatitis B, C, and immune deficiency.

KPV

Lys-Pro-Val · Alpha-MSH(11-13)

A tripeptide representing the C-terminal fragment of alpha-melanocyte stimulating hormone (α-MSH). Retains the anti-inflammatory properties of α-MSH with superior stability.

Pentadeca Arginate

PDA · BPC-157 arginate salt

A modified form of BPC-157 stabilized as an arginate salt, designed to be more stable at room temperature and suitable for oral administration research.

Half-life

Similar to BPC-157 (~4 hours)

~1594 Da (as arginate salt)

Anti-AgingIn Stock

GHK-Cu

Copper peptide · Copper tripeptide-1

A naturally occurring copper-binding tripeptide found in human plasma. Extensively studied for skin regeneration, wound healing, and anti-aging effects through gene activation.

Half-life

Short (minutes to a few hours in circulation)

340.4 Da

Anti-Aging

Epithalon

Epithalamin · Epitalon

A synthetic tetrapeptide based on the pineal gland extract epithalamin. The subject of 35+ years of Soviet and Russian longevity research, primarily studying telomere elongation and lifespan extension in animals.

MOTS-c

Mitochondrial ORF of the 12S rRNA type-c · Mitochondrial-derived peptide

A mitochondria-encoded peptide that acts as a metabolic regulator. Research shows AMPK activation, insulin sensitivity improvements, and potential lifespan extension in animal models.

Half-life

~12–24 hours

2174.5 Da

Cognitive Enhancement

Dihexa

PNB-0408 · N-hexanoic-Tyr-Ile-(6) aminohexanoic amide

A small peptide derived from angiotensin IV with extremely potent pro-cognitive effects in animal models — reportedly up to 10 million times more potent than BDNF at facilitating synaptogenesis.

Half-life

Extended (days) due to metabolic stability

454.6 Da

Cognitive Enhancement

Semax

ACTH(4-7)Pro-Gly-Pro · Met-Glu-His-Phe-Pro-Gly-Pro

A synthetic heptapeptide analogue of ACTH(4-7) developed in Russia. Studied extensively for neuroprotection, cognitive enhancement, BDNF upregulation, and stroke treatment.

Half-life

~1–2 minutes (plasma); CNS effects last hours

887.0 Da

Cognitive Enhancement

Selank

TP-7 · Thr-Lys-Pro-Arg-Pro-Gly-Pro

A synthetic heptapeptide analogue of tuftsin developed in Russia. Studied for anxiolytic effects without sedation, memory enhancement, and modulation of BDNF and IL-6.

Half-life

~1–2 minutes (plasma)

751.9 Da

Sexual Health

PT-141

Bremelanotide · Vyleesi (pharmaceutical form)

A melanocortin receptor agonist that acts centrally on hypothalamic pathways to induce sexual arousal. Unlike PDE5 inhibitors, it works through the CNS rather than the vascular system.

Kisspeptin-10

KP-10 · Metastin(112-121)

The shortest bioactive fragment of kisspeptin, a hypothalamic neuropeptide critical for the pulsatile release of GnRH and the initiation of puberty.

Half-life

~28 minutes (iv), longer subcutaneous

1302.5 Da

Tanning & Pigmentation

Melanotan II

MT-2 · MT-II

A synthetic cyclic analogue of alpha-MSH. Potently activates melanocortin receptors to induce melanogenesis, and also acts centrally to stimulate sexual arousal (leading to the PT-141 discovery).

Half-life

~30–60 minutes

1024.2 Da

Tanning & Pigmentation

Melanotan I

Afamelanotide · CUV1647

A linear synthetic analogue of α-MSH with higher selectivity for MC1R than Melanotan II. A pharmaceutical formulation (Scenesse) is approved in Europe and the US for erythropoietic protoporphyria.

Half-life

Implant formulation provides slow release over ~2 months

1646.9 Da

Metabolic

Humanin

HN · Humanin-G (S14G variant)

A mitochondria-encoded 21-amino acid peptide with cytoprotective, neuroprotective, and metabolic effects. Plasma levels decline sharply with age.

SS-31

Elamipretide · MTP-131

A cell-permeable tetrapeptide that targets the inner mitochondrial membrane and cardiolipin, protecting mitochondrial structure and function. Under clinical investigation for heart failure and mitochondrial myopathy.

Delta Sleep-Inducing Peptide

DSIP · Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu

A neuropeptide originally isolated from rabbit blood during sleep. Associated with sleep stage modulation, stress adaptation, antioxidant activity, and normalization of hypothalamic-pituitary hormone release.

LL-37

Cathelicidin · Human antimicrobial peptide 18

The only member of the cathelicidin family of host defense peptides in humans. Has broad-spectrum antimicrobial activity and diverse immunomodulatory effects.

Half-life

~1–2 hours

4493.4 Da

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