Muscle Growth
Growth Hormone Secretagogue & IGF-1 Research
Peptide research in lean mass development focuses on compounds that interact with the growth hormone axis and insulin-like growth factor signaling. These include GHRH analogs, ghrelin receptor agonists, and extended-half-life IGF-1 variants.
Studies indicate that CJC-1295 (no DAC) and Ipamorelin stimulate pulsatile growth hormone release through complementary pituitary pathways, while IGF-1 LR3 directly activates PI3K/Akt/mTOR signaling to promote muscle protein synthesis and satellite cell proliferation.
All compounds are supplied strictly for laboratory research purposes. These statements have not been evaluated by the FDA.
Muscle Growth Peptides
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How Peptides Support Muscle Growth
GHRH Receptor Activation
Research suggests CJC-1295 (no DAC) binds pituitary GHRH receptors to stimulate endogenous growth hormone pulses, elevating circulating IGF-1 levels without prolonged receptor desensitization.
Ghrelin Receptor Agonism
Studies indicate Ipamorelin selectively activates GHS-R receptors to trigger pituitary GH secretion with minimal impact on cortisol or prolactin, supporting lean mass accrual in preclinical models.
PI3K/Akt/mTOR Signaling
IGF-1 LR3 directly binds IGF-1 receptors on muscle cells, activating PI3K/Akt/mTOR and MAPK pathways to drive muscle protein synthesis, ribosomal activity, and nutrient uptake.
Satellite Cell Activation
Research suggests IGF-1 signaling exits quiescent satellite cells from dormancy, promoting their proliferation and differentiation into myoblasts that fuse with existing muscle fibers for repair and hypertrophy.
Research Protocols
Structured tiers for researchers investigating muscle growth pathways, from foundational single-compound studies to multi-pathway protocols.
Beginner
Lean Mass Core
An introductory protocol pairing a GH secretagogue blend with gastric pentadecapeptide tissue-repair signaling for researchers beginning GH-axis and recovery-pathway studies.
Compounds
Intermediate
Lean Mass Plus
Adds direct IGF-1 receptor pathway activation alongside secretagogue and regenerative peptides for researchers investigating combined GH-axis and IGF-driven lean mass signaling.
Compounds
Advanced
Lean Mass Complete
A comprehensive protocol for experienced researchers studying GH-axis, IGF-1, GHRH analog, actin-mediated repair, gastric pentadecapeptide, and copper-tripeptide matrix pathways together.
Explore the Muscle Growth Collection
Browse all research-grade compounds for muscle growth studies.
View Muscle Growth ProductsThese statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. All products sold on this site are intended for laboratory research purposes only. Not for human consumption. MHS Longevity is a chemical supplier and is not a compounding pharmacy or outsourcing facility under 503A or 503B of the Federal Food, Drug, and Cosmetic Act.