Estradiol (E2)
Hormones marker
Estradiol
Estradiol (E2)
Primary estrogen. Important for bone health, lipids, and cardiovascular protection.
PED Notes
Aromatizable AAS (testosterone, dianabol, nandrolone) increase estradiol. CRITICAL: Elevated E2 in enhanced athletes should be managed by SYMPTOMS, not numbers alone. Estradiol is cardioprotective, neuroprotective, essential for libido, joint health, and lipid profiles -- crashing it causes more harm than running it high. Symptoms of genuinely problematic high E2: sensitive/puffy nipples or gyno onset, excessive water retention and bloating, emotional instability or anxiety, erectile dysfunction or loss of libido, elevated blood pressure from fluid retention. If E2 is elevated but no symptoms are present, do NOT intervene. Optimal TRT range is 70-180 pmol/L but many enhanced athletes run higher without issues.
When symptomatic (gyno, bloating, ED, mood, high BP):
First-line -- SERM (blocks at tissue, preserves systemic E2):
- Tamoxifen (Nolvadex) -- 10-20mg/day for gyno prevention
Second-line -- AI (lowers systemic E2, worsens lipids):
- Anastrozole -- 0.25-0.5mg EOD, lowest effective dose
- Exemestane -- 12.5mg EOD
Important: Never use prophylactic AI without symptoms. AIs worsen lipid profiles.
References:
- Baggish, A. L., Weiner, R. B., Kanayama, G., et al. (2017). Cardiovascular toxicity of illicit anabolic-androgenic steroid use. Circulation, 135(21), 1991-2002. DOI: 10.1161/CIRCULATIONAHA.116.026945
- Kanayama, G., Hudson, J. I., & Pope, H. G., Jr. (2008). Long-term psychiatric and medical consequences of anabolic-androgenic steroid abuse. Drug and Alcohol Dependence, 98(1-2), 1-12. DOI: 10.1016/j.drugalcdep.2008.05.004
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