LGD-4033 vs RAD-140 vs Cardarine — SARM Research Comparison
QSC Research Guide
LGD-4033 vs RAD-140 vs Cardarine — SARM Research Comparison
Three non-steroidal selective compounds often grouped as ‘SARMs’ — LGD-4033 and RAD-140 are true AR agonists with tissue selectivity, while Cardarine is a PPARδ agonist with no AR activity, requiring different classification. Each has distinct pharmacological profiles for skeletal muscle, bone, CNS, and metabolic research.
Side-by-Side Comparison
Attribute
LGD-4033 (Ligandrol)
RAD-140 (Testolone)
Cardarine (GW501516)
Mechanism class
Non-steroidal selective AR agonist
Highly selective non-steroidal AR agonist
PPARδ agonist (not an AR agonist)
Receptor targets
Androgen receptor (AR)
Androgen receptor (AR) + neuroprotective
PPARδ (PPAR delta)
Half-life
~24-36 hours
~60 hours
~16-24 hours
Key advantage
High AR affinity and selectivity — anabolic in muscle and bone with minimal prostate/HPG suppression at low doses. Phase 1 human data
Highest AR affinity in the SARM class (~100× more potent than testosterone in some assays); unique neuroprotective AR activity in brain
PPARδ-mediated fatty acid oxidation gene expression — endurance enhancement, GLUT4 upregulation. No AR activity. Narkar 2008 (Cell) co-study with AICAR
Best for research
Selective AR agonism, muscle anabolism, bone density, HPG axis impact vs. testosterone comparison
High-affinity AR research, neuroprotective androgen signalling, AR selectivity extremes
LGD-4033 and RAD-140 are genuine AR agonists with tissue selectivity; Cardarine is mechanistically distinct — a PPARδ agonist with no androgen receptor activity. LGD-4033 has the most human clinical data; RAD-140 has the highest AR potency and unique CNS neuroprotective applications. Cardarine is purely a metabolic research tool for fatty acid oxidation and endurance research.
Frequently Asked Questions
Is Cardarine a SARM?
Technically no — Cardarine (GW501516) does not bind the androgen receptor. It is a PPARδ (peroxisome proliferator-activated receptor delta) agonist. Despite being commonly grouped with SARMs in research literature, its mechanism is entirely distinct from LGD-4033 or RAD-140.
What is the difference between LGD-4033 and RAD-140?
Both are selective non-steroidal AR agonists but with different potency profiles. RAD-140 has higher absolute AR affinity than LGD-4033 in some assays. RAD-140 also shows unique neuroprotective AR activity in brain tissue that LGD-4033 does not exhibit. LGD-4033 has Phase 1 published human data (Basaria 2013) with defined PK/PD profile.
Is Cardarine safe for research use?
Cardarine research was discontinued in Phase 2 when animal studies showed tumour formation at high chronic doses. This is relevant context for research design. Researchers should review the Olson 2012 (PPAR Research) safety analysis. QSC supplies Cardarine for in vitro and approved in vivo laboratory research use only.
Research Use Only: All QSC compounds are sold strictly for laboratory research purposes only. Not for human consumption, veterinary use, or any other application. Researchers are responsible for compliance with local regulations.
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