Ecdysterone (Beta-Ecdysterone)
Ecdysterone is a phytosteroid that promotes muscle protein synthesis and lean mass gains without androgenic effects, making it popular among athletes for enhancing strength and performance.
Evidence last reviewed: 20 Apr 2026
Moderate evidence shows ecdysterone can significantly increase lean mass and strength in trained athletes. However, the theoretical basis for muscle protein synthesis enhancement is not well-supported by strong clinical data.
Muscle protein synthesisGeneral population · TheoreticalVery low
Ecdysterone is believed to enhance muscle protein synthesis via the mTOR/PI3K pathway.
Lean mass gainTrained athletes · RCTModerate
Significant increases in lean mass were observed in athletes taking ecdysterone compared to placebo.
Muscle strength improvementTrained athletes · RCTModerate
Athletes experienced significant improvements in muscle strength.
Athletic Performance and Muscle Growth
Combining Ecdysterone with Leucine can enhance athletic performance and support muscle growth. Ecdysterone is an anabolic agent that promotes muscle growth, while Leucine is a key amino acid for muscle protein synthesis.
Forms & usage▾
Take 300-600 mg daily, ideally before workouts.