HGH vs LGD-4033
FDA Approved vs Moderate Research
monitor Mechanism-based · 51% Both HGH and LGD-4033 can elevate estrogen. Combined estrogenic load increases risk of gynecomastia, water retention, and mood changes. Monitor estradiol levels and consider AI if needed.
Molecular Data
HGH LGD-4033
Weight 22,124 Da 338.25 Da
Half-life 3-4 hours (SC), 20-30 minutes (IV) ~24-36 hours
Chain 191 amino acids —
Type Single-chain polypeptide with two disulfide bridges Nonsteroidal selective androgen receptor modulator (C14H12F6N2O)
Key Benefits
HGH
01 Improved body composition (increased lean mass, decreased fat)
02 Enhanced bone mineral density
03 Improved lipid profile
04 Increased exercise capacity
05 Better quality of life and mood
06 Skin, hair, and nail improvements
07 Enhanced recovery and healing
LGD-4033
01 Strongest SARM for lean muscle mass accrual, with clinical trial data supporting dose-dependent increases in lean body mass
02 Tissue-selective action with minimal stimulation of the prostate and other androgen-sensitive tissues
03 Clinical evidence of improved physical function (leg press strength, stair-climbing speed) in hip fracture patients
04 No aromatization to estrogen (no estrogen-related water retention or gynecomastia at the receptor level)
05 No conversion to DHT (reduced risk of androgenic hair loss and prostate stimulation compared to testosterone)
06 Convenient once-daily oral dosing due to 24-36 hour half-life
07 Phase 2 clinical data available, providing a stronger evidence base than most other SARMs
Dosing Protocols
HGH
1-4 IU daily (0.33-1.33mg); start low and titrate up / Once daily or split into 2 doses (morning and evening)
Medical GHD (Starting) 0.15-0.3mg/day (0.5-1 IU) Once daily
Medical GHD (Maintenance) 0.4-0.8mg/day (1.2-2.4 IU) Once daily
Anti-Aging/Wellness 1-2 IU/day (0.33-0.67mg) Once daily
Body Recomposition 2-4 IU/day (0.67-1.33mg) Once or twice daily
Performance (Higher Risk) 4-8 IU/day (1.33-2.67mg) Split twice daily
LGD-4033
5-10 mg/day / Once daily (oral)
Side Effects
HGH
Water retention and fluid accumulation
Joint pain and stiffness
Carpal tunnel syndrome (usually resolves with dose reduction)
Headaches
Numbness/tingling in hands
LGD-4033
Testosterone suppression (dose-dependent; more suppressive than Ostarine at equivalent doses, occurs in most users by week 4-6)
Water retention (non-estrogenic mechanism, typically mild to moderate, contributes to scale weight increase)
HDL cholesterol reduction (dose-dependent lipid impact observed in clinical trials)
Headaches (most common in the first 1-2 weeks, usually transient)
Fatigue or lethargy (related to testosterone suppression, typically becomes noticeable mid-cycle)
Reduced libido (related to HPG axis suppression, severity varies by dose and individual)
Contraindications
Active cancer (may accelerate tumor growth)
Acute critical illness (increased mortality in ICU patients)
Closed epiphyses in children (for growth promotion)
Pregnancy/breastfeeding
Pre-existing liver disease or elevated liver enzymes at baseline
Hormone-sensitive cancers (prostate cancer or other androgen-driven malignancies)
Pregnancy or potential pregnancy (teratogenic risk from androgen receptor agonism)
Breastfeeding
Age under 25 (incomplete endocrine system maturation and higher risk of HPG axis disruption)
Concurrent use of hepatotoxic medications without medical supervision
Known cardiovascular disease (insufficient long-term safety data for this population)
History of significant lipid abnormalities (LGD-4033 suppresses HDL)
Research Evidence
HGH LGD-4033
Status FDA Approved Moderate Research
References 4 studies 5 studies
Latest 2024 2018
FDA Approved Yes No
This comparison is for educational and research purposes only. Consult a healthcare professional before use.