Ranked by data
The best muscle-growth peptides — GH secretagogues, HGH, and IGF-1 analogues — ranked by muscle-growth effectiveness scores, with dosing details.
10 compounds · ranked by muscle growth score
Peptides build muscle indirectly through the GH/IGF-1 axis, so expectations should differ from anabolics — slower, but with sleep and recovery benefits along the way. This list ranks the GH & IGF axis class by our 0–10 muscle-growth effectiveness score. Each entry links to a full guide covering dosing, timing, and stacking.
IGF-1 Analog
Explore IGF-1 LR3 research, community protocol questions and differences from native IGF-1 and DES. Compare the evidence and matching research supplier listings.
Read the full IGF-1 LR3 guideAvailable at Real Peptides (US) — 20% off auto-applied
Affiliate link — we may earn a commission at no cost to you.
Native insulin-like growth factor; recombinant form: mecasermin
Understand native IGF-1, mecasermin and how they differ from LR3 and DES. Compare research, dosage context and the matching compound and supplier guides.
Read the full IGF-1 guideTruncated IGF-1 Analog
Evidence-based IGF-1 DES guide: pre-workout site-injection protocol for lagging body parts, dosing per site, GH and LR3 stacks, half-life, and side effects.
Read the full IGF-1 DES guideAvailable at Swiss Chems (US) — 10% off auto-applied
A 5-week protocol at 75 mcg/day ≈ 3 vials
Affiliate link — we may earn a commission at no cost to you.
Non-Peptide Ghrelin Receptor Agonist (GHS-R1a)
Acetamoren (MK-777) guide: oral ghrelin-receptor agonist dosing, MK-677 comparison, IGF-1 and sleep protocol, side effects, and stack pairings for recomp.
Read the full Acetamoren guideGHRH Analog + GHRP (Ghrelin Agonist) Blend
Evidence-based CJC-1295 + ipamorelin guide: saturation dosing, DAC vs Mod GRF 1-29, fasted injection timing, recomp and sleep protocols, and side-effect management.
Read the full CJC-1295 + Ipamorelin guideAvailable at Real Peptides (US) — 20% off auto-applied
A 12-week protocol at the documented component doses ≈ 9 vials
Affiliate link — we may earn a commission at no cost to you.
Growth Hormone Secretagogue (Ghrelin Mimetic)
Evidence-based GHRP-6 guide: 100–200mcg dosing, 3-pulse protocol, mod-GRF / CJC-1295 stack, appetite and bulking use case, side effects, and cycle length.
Read the full GHRP-6 guideAvailable at Real Peptides (US) — 20% off auto-applied
A 12-week protocol at 125 mcg 3×/day ≈ 4 vials
Affiliate link — we may earn a commission at no cost to you.
Growth Hormone Secretagogue (GHRP)
Hexarelin protocol guide: 100 mcg saturation dose, CJC-1295 stack for GH pulse, cycle length, desensitization management, cortisol/prolactin side effects.
Read the full Hexarelin guideAvailable at Real Peptides (US) — 20% off auto-applied
A 6-week protocol at 150 mcg twice daily ≈ 3 vials
Affiliate link — we may earn a commission at no cost to you.
Recombinant Human Growth Hormone (191-aa)
Evidence-based HGH guide: somatropin dosing from 1 IU anti-aging to 6 IU recomp, IGF-1 targets, slin/T3 stack, injection timing, side effects, and kit verification.
Read the full HGH (Somatropin) guideGrowth Hormone Secretagogue (GHS-R1a Agonist)
Evidence-based MK-677 guide: 25 mg dosing protocol, IGF-1 bloodwork targets, cycle length, SARM and TRT stacks, side effects, and glucose management.
Read the full MK-677 guideAvailable at Real Peptides (US) — 20% off auto-applied
Affiliate link — we may earn a commission at no cost to you.
IGF-1 Splice Variant (E-peptide)
PEG-MGF protocol for lifters: post-workout IM dosing for satellite-cell activation, IGF-1 LR3 and GH stack timing, cycle length, and side-effect profile.
Read the full PEG-MGF guideAvailable at Real Peptides (US) — 20% off auto-applied
A 5-week protocol at 300 mcg twice weekly ≈ 2 vials
Affiliate link — we may earn a commission at no cost to you.
Every compound in our library is scored 0–10 on six effectiveness axes (muscle growth, fat loss, strength, endurance, recovery, cognition) as part of our content pipeline. This page filters the library to GH & IGF and sorts by the muscle growth score. Compounds that score zero on this axis are omitted. Rankings recompute automatically whenever the underlying compound data changes — they are never influenced by affiliate relationships.