Androstenedione (prohormone)

Tier 4 — risky / avoid · Banned · Liver toxicity · Hormonal

A testosterone precursor banned by the FDA and most sports organizations. Despite marketing claims, it does not reliably increase testosterone but does increase estrogen levels in men. Associated with liver damage, acne, and hormonal disruption. Classified as a controlled substance. There is no legitimate reason to use this supplement.

Dose: AVOID — banned substance; increases estrogen, not testosterone; liver toxicity risk