Source comparison
Comparison table
This comparison table helps clarify the roles of these two compounds. Feature MK-677 LGD-4033 Classification Growth hormone secretagogue (GHS) Selective androgen receptor modulator (SARM) Boosts GH/IGF-1 Yes No Testosterone suppression No significant suppressi
This comparison does not assign a generated winner or score.
- This comparison table helps clarify the roles of these two compounds.
- Feature
- MK-677
- LGD-4033
- Classification
- Growth hormone secretagogue (GHS)
- Selective androgen receptor modulator (SARM)
- Boosts GH/IGF-1
- Yes
- No
- Testosterone suppression
- No significant suppression
- Dose-dependent suppression
- Muscle growth speed
- Gradual, long-term anabolic gains
- Rapid, noticeable muscle and strength gains
- What is it best for?
- Recovery, sustained muscle growth, anti-aging, joint health
- Bulking, rapid strength, and lean mass gains
- Legality/sourcing
- Generally legal as a research chemical; easier to source reliably
- Often unapproved for human use; legality varies, sourcing can be risky
- Post-cycle therapy needed?
- No, can be used continuously without PCT
- Yes, post-cycle therapy required due to suppression