Source comparison
Best Peptides for Muscle Building: Mechanism Comparison
The following table compares peptide classes by primary mechanism, typical dosing, and expected outcomes. Understanding which pathway each compound targets is essential for stacking protocols that avoid redundancy and maximize synergy. GHRP-2, GHRP-6 Ghrelin r
This comparison does not assign a generated winner or score.
- The following table compares peptide classes by primary mechanism, typical dosing, and expected outcomes. Understanding which pathway each compound targets is essential for stacking protocols that avoid redundancy and maximize synergy.
- GHRP-2, GHRP-6
- Ghrelin receptor agonism → pulsatile GH release
- 100–200mcg 1–3x daily
- 1.5–2.5kg lean mass gain with training
- Strong evidence, minimal side effects, synergizes with GHRH analogs
- CJC-1295 + Ipamorelin
- GHRH receptor activation + ghrelin receptor → amplified GH pulse
- 100mcg each 1–2x daily
- 2.0–3.0kg lean mass gain with training
- Best risk-benefit profile for sustained use, physiological GH pattern
- IGF-1 LR3
- Direct IGF-1 receptor activation → mTOR-mediated protein synthesis
- 20–60mcg daily post-workout
- 0.5–1.5kg lean mass gain independent of GH
- Potent but insulin resistance risk, requires glucose monitoring
- MK-677 (Ibutamoren)
- Oral ghrelin agonist → chronic GH/IGF-1 elevation
- 12.5–25mg daily
- 1.0–2.0kg lean mass gain, increased appetite
- Convenient oral dosing, appetite increase, water retention common
- TB-500
- Angiogenesis, actin polymerization → tissue repair
- 2–2.5mg 2x weekly (loading)
- Reduced DOMS, improved training capacity
- Indirect benefit through enhanced recovery, not a direct anabolic
- BPC-157
- VEGF/EGF upregulation → connective tissue healing
- 250–500mcg daily
- Faster injury recovery, reduced joint pain
- Limited human data, strong anecdotal support for soft tissue repair
- This comparison assumes concurrent resistance training (4–6 sessions weekly), adequate protein intake (1.8–2.2g/kg), and caloric intake at maintenance or slight surplus. Peptide efficacy drops precipitously in caloric deficit or with suboptimal training stimulus.