Source comparison
Peptides to Build Muscle After 50 Ranked: Mechanism Comparison
CJC-1295/Ipamorelin GHRH + GHRP synergy. Amplifies GH pulse duration and amplitude Subcutaneous injection 60–90% over baseline (JCEM study) 100–300 mcg each, 3–5x/week before bed Highest consistency for measurable anabolic markers in older adults. Gold standar
This comparison does not assign a generated winner or score.
- CJC-1295/Ipamorelin
- GHRH + GHRP synergy. Amplifies GH pulse duration and amplitude
- Subcutaneous injection
- 60–90% over baseline (JCEM study)
- 100–300 mcg each, 3–5x/week before bed
- Highest consistency for measurable anabolic markers in older adults. Gold standard GHS stack
- BPC-157
- Collagen synthesis, angiogenesis, anti-inflammatory signaling
- Subcutaneous injection (oral contested)
- No direct effect on IGF-1
- 250–500 mcg daily, split doses
- Essential for tendon/joint integrity. Enables training consistency but doesn't drive muscle growth independently
- MK-677 (Ibutamoren)
- Ghrelin receptor agonist. Oral GH secretagogue
- Oral (capsule/liquid)
- 40–60% increase in 12-month trials
- 10–25 mg daily before bed
- Convenient oral option with appetite boost. Risk of insulin resistance limits long-term use
- Hexarelin
- GHRP-6 analogue. Potent GH pulse but desensitizes quickly
- 50–80% transient increase
- 100 mcg 2–3x/day for 2–4 weeks, then cycle off
- Strong acute effect but receptor desensitization requires cycling. Less practical for sustained protocols
- Thymosin Beta-4 (TB-500)
- Actin-binding protein. Tissue repair, reduced inflammation
- No direct IGF-1 effect
- 2–5 mg twice weekly for 4–6 weeks
- Supports connective tissue healing. Often combined with BPC-157 for injury recovery rather than muscle gain