Turkesterone / Ecdysteroids

Tier 3 — weak evidence · Anabolic / Muscle building

Heavily marketed on social media as a natural steroid alternative, but two 2024–2025 randomised trials found no significant changes in muscle mass, fat mass, or strength after 4 weeks at 500 mg per day compared to placebo. Ecdysteroids that cause muscle growth in insects appear to work through completely different pathways in humans. Expensive, ineffective, and not worth buying.

Dose: Null results at 500–1,000 mg/day in human RCTs — no evidence-based dose can be recommended