The most studied peptides in athletic performance research. All compounds available at qscpeptide.com with full COA documentation and USA domestic shipping.
CJC-1295 is a long-acting GHRH analog studied for its ability to elevate GH and IGF-1 levels sustainably. The DAC (Drug Affinity Complex) form extends half-life to 6-8 days via albumin binding. Central to GH secretagogue research and body composition studies.
Source at QSC →Ipamorelin is considered the most selective GHRP studied, producing clean GH pulses with minimal cortisol or prolactin elevation. Frequently combined with CJC-1295 in research studying GH axis dynamics and muscle recovery protocols.
Source at QSC →IGF-1 LR3 is a modified insulin-like growth factor with reduced binding affinity to IGF binding proteins, giving it a substantially longer half-life than native IGF-1. Extensively studied for its role in muscle protein synthesis, satellite cell activation, and anabolic signaling.
Source at QSC →Tesamorelin is a stabilized GHRH analog studied for visceral fat reduction in HIV-associated lipodystrophy. Now widely researched in the context of body composition optimization, metabolic health, and cognitive function in aging populations.
Source at QSC →Kisspeptin-10 is a neuropeptide studied for its role in stimulating GnRH (gonadotropin-releasing hormone) secretion, which in turn stimulates LH and FSH release. Researchers use it to study reproductive axis restoration and testosterone regulation in male and female models.
Source at QSC →QSC's proprietary Clavicular Ascension protocol is a curated research stack targeting the GH axis, recovery, and performance optimization. Designed by QSC researchers to maximize synergistic compound interactions in a structured research framework.
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Serious researchers also explore recovery compounds. BPC-157 and TB-500 are the most studied peptides for tissue repair, healing, and regeneration science.
Body Protection Compound 157 is one of the most researched repair peptides available. Derived from a stomach gastroprotective protein, research shows it accelerates healing of tendons, ligaments, gut lining, and muscle tissue in animal models. Frequently combined with TB-500 in recovery research protocols.
Source BPC-157 at QSC →Thymosin Beta-4 fragment (TB-500) is studied for its role in angiogenesis, cell migration, and systemic wound healing. Unlike BPC-157 which acts locally, TB-500 shows systemic distribution in research models — making it valuable for studying cardiovascular tissue, muscle recovery, and joint regeneration.
Source TB-500 at QSC →Research-grade performance and hormone optimization peptides with full mechanism breakdowns. All compounds available via QSC Peptides with ≥99% HPLC purity and COA.
IGF-1 LR3 (Long R3 IGF-1) is a synthetic analog of Insulin-Like Growth Factor-1, modified at two positions: an arginine substitution at position 3 (R3) and an extension of the N-terminus with 13 amino acids. These modifications dramatically reduce its binding affinity to IGF-binding proteins (IGFBPs), which normally sequester ~97% of endogenous IGF-1 in plasma. The result is a compound with significantly extended bioavailability — approximately 20–30 hours versus 12–15 hours for native IGF-1 — and greater receptor access.
IGF-1 LR3 binds to the IGF-1 receptor (IGF-1R), a transmembrane tyrosine kinase receptor expressed in muscle, bone, liver, and neural tissue. Receptor activation initiates downstream signaling primarily through the PI3K/Akt/mTOR pathway — a central axis in protein synthesis, muscle cell proliferation, and glucose uptake. Simultaneously, the Ras/Raf/MAPK cascade is activated, influencing cell differentiation and survival.
IGF-1 LR3 is available from QSC Peptides as lyophilized powder with ≥99% HPLC purity. Its extended half-life compared to native IGF-1 makes it particularly useful for studies requiring sustained receptor engagement. Researchers should note that its reduced IGFBP binding means plasma levels do not reflect typical endogenous IGF-1 distribution patterns.
CJC-1295 is a synthetic analog of GHRH (Growth Hormone Releasing Hormone) — the hypothalamic peptide that stimulates the anterior pituitary to secrete growth hormone. It incorporates Drug Affinity Complex (DAC) technology: a maleimido-propionoyl biotin modification at the C-terminus that enables covalent binding to serum albumin. This dramatically extends plasma half-life from minutes (native GHRH) to 6–8 days.
A critical question in GH axis research is whether continuous vs. pulsatile GH secretion produces different physiological effects. CJC-1295's long half-life elevates baseline GH and IGF-1 sustainably without abolishing natural pulsatile release. Research has explored whether this baseline elevation produces additive effects when combined with pulsatile secretagogues like ipamorelin — studies consistently show synergistic GH responses when both are used together in animal models.
Ipamorelin is a pentapeptide growth hormone releasing peptide (GHRP) and selective ghrelin receptor (GHS-R1a) agonist. Developed as a third-generation GHRP, it was specifically designed to maximize GH secretion selectivity while eliminating the off-target effects of earlier GHRPs (GHRP-2, GHRP-6) — namely ACTH elevation, cortisol increase, and prolactin stimulation. This selectivity profile makes it the preferred GHRP in most research contexts.
The distinction matters scientifically: earlier GHRPs trigger non-selective receptor activation that complicates interpretation of results by introducing cortisol and prolactin confounders. Ipamorelin isolates the GH secretory effect, making it invaluable for studying the specific metabolic, anabolic, and recovery-related effects of GH pulsatility independently of stress hormone activation.
The Clavicular Ascension and other QSC-curated research protocols combine complementary peptides based on mechanism synergy and research data. Below is a deep-dive into each stack's rationale.
| Compound | Class | Primary Target | Key Research Use | Half-Life | QSC Stock |
|---|---|---|---|---|---|
| IGF-1 LR3 | IGF-1 analog | IGF-1R (PI3K/Akt/mTOR) | Muscle hypertrophy, protein synthesis, satellite cells | ~20–30h | In Stock |
| CJC-1295 | GHRH analog (DAC) | GHRH-R (pituitary) | GH elevation, IGF-1 increase, body composition | 6–8 days | In Stock |
| Ipamorelin | GHRP / GHS-R1a | Ghrelin receptor (selective) | GH pulse induction, clean profile, synergy with GHRH | ~2h | In Stock |
| BPC-157 | Gastric peptide | NO system, growth factor upregulation | Tissue repair, tendon healing, anti-inflammatory | ~4h | In Stock |
| TB-500 | Thymosin β4 fragment | Actin, VEGF-R, cell migration | Angiogenesis, wound healing, cardiac repair | ~2–3 days | In Stock |
| Tesamorelin | GHRH analog | GHRH-R (pituitary) | Visceral fat reduction, GH deficiency models | ~26 min | In Stock |
| Kisspeptin-10 | Kisspeptin / GPR54 | GPR54 → GnRH neurons | HPG axis, sex hormone regulation, fertility research | ~28 min | Available |
Key preclinical research summaries on performance and hormone optimization peptides.
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⚠ RESEARCH USE ONLY — All compounds referenced on this site are for in vitro and animal research purposes only. Not FDA-approved for human use. PerformancePeptides.com is an independent educational resource and affiliate of QSC Peptides (qscpeptide.com). This site does not provide medical advice. Always consult a licensed healthcare professional.