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Performance

Beta Ecdysterone

Also known as: Ecdysterone, 20-hydroxyecdysone, Cyanotis arachnoidea extract, Rhaponticum carthamoides ecdysterone

C
Evidence

Beta ecdysterone is a plant-derived steroid hormone analog studied for potential muscle-building and athletic performance effects. Evidence for human efficacy remains limited, with most studies showing modest improvements in strength or body composition, though results are inconsistent.

Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.

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Primary uses

  • Muscle growth and lean mass
  • Athletic performance
  • Strength enhancement

How it works

  • Potential anabolic signaling via non-androgenic pathways
  • Possible protein synthesis enhancement
  • Reported muscle fiber growth stimulation in animal models

Dosage

Typical range
250-1000 mg daily (standardized to 10-50% ecdysterone content)
Timing
Distributed throughout the day with meals
With food
Recommended; may improve absorption
Duration
Most studies evaluated 8-12 week durations
Special populations
Safety in athletes subject to drug testing standards should be verified; limited data in women and younger populations

Forms

  • Cyanotis arachnoidea root extract· 70/100
  • Standardized extract powder· 70/100

Safety

Common side effects

  • Generally well-tolerated
  • Rare reports of mild gastrointestinal upset

Contraindications

  • Pregnancy and lactation (insufficient safety data)
  • Hormone-sensitive cancers (theoretical concern, limited evidence)

Evidence notes

Limited human RCT data with mixed results. Some studies suggest modest benefits for strength or muscle mass, but effect sizes are generally small and findings are not consistently replicated. Animal and in vitro data are more promising but do not reliably translate to humans.

Grade C: Mostly observational or small trials; mechanism is plausible but unproven at scale.

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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.