Boldenone vs LGD-4033
Moderate Research vs Moderate Research
synergistic Mechanism-based · 60% LGD-4033 helps manage estrogen conversion from Boldenone. This is a common and recommended combination. Adjust AI dose based on bloodwork — avoid crashing estrogen.
Molecular Data
Boldenone LGD-4033
Weight 286.41 Da (base) 338.25 Da
Half-life ~14 days (undecylenate) ~24-36 hours
Type 1-dehydrotestosterone steroid (C19H26O2) Nonsteroidal selective androgen receptor modulator (C14H12F6N2O)
Key Benefits
Boldenone
01 Lean, quality muscle gains with minimal water retention compared to testosterone
02 Enhanced vascularity through increased red blood cell production and reduced subcutaneous water
03 Significant increase in appetite, supporting caloric surplus during mass-gaining phases
04 Potent stimulation of erythropoiesis, increasing oxygen-carrying capacity and endurance
05 Lower estrogenic activity than testosterone, reducing the need for aromatase inhibitors
06 Lower androgenic side effects (hair loss, acne, prostate stimulation) than testosterone
07 Favorable anabolic-to-androgenic ratio (100:50 compared to testosterone at 100:100)
08 Improved collagen synthesis reported anecdotally, supporting joint and connective tissue health
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
Boldenone
200-400 mg/week (moderate) / 1-2x per week (undecylenate)
Lean Bulk - Moderate 200-400 mg/week 1-2x per week (undecylenate)
Performance Enhancement - Standard 400-600 mg/week 2x per week (undecylenate)
Performance Enhancement - High 600-700 mg/week 2x per week (undecylenate)
Boldenone Cypionate Protocol 200-400 mg/week Every 3-4 days
LGD-4033
5-10 mg/day / Once daily (oral)
Side Effects
Boldenone
Increased hematocrit and red blood cell count (the primary and most clinically significant side effect, more pronounced than with most other AAS)
Increased appetite (significant and dose-dependent, can be a benefit or hindrance depending on goals)
Anxiety and restlessness ('EQ anxiety' is widely reported anecdotally, particularly at higher doses or in anxiety-prone individuals)
Mild acne and oily skin (less than testosterone due to lower androgenic activity)
Suppression of endogenous testosterone production (profoundly suppressive, as with all AAS)
Mild hair thinning in genetically predisposed individuals (less than testosterone but not absent)
Elevated blood pressure secondary to increased blood volume from erythrocytosis
Increased vascularity (cosmetic effect, but indicative of elevated RBC)
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
Polycythemia or elevated hematocrit (above 50% at baseline)
Cardiovascular disease, coronary artery disease, or history of thromboembolic events
Hepatic impairment or liver disease
Prostate cancer (active or history of hormone-sensitive prostate cancer)
Pre-existing anxiety disorders (boldenone may significantly exacerbate anxiety symptoms)
Pregnancy or potential for pregnancy (Category X)
Known hypersensitivity to boldenone or any formulation components
Renal impairment (boldenone metabolites are renally cleared)
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
Boldenone LGD-4033
Status Moderate Research Moderate Research
References 5 studies 5 studies
Latest January 2017 2018
FDA Approved No No
This comparison is for educational and research purposes only. Consult a healthcare professional before use.