Compare Supplements

Prescription androgen — no supplement dose applies. Historic clinical/label use was oral mesterolone 25-150 mg/day (e.g. 25 mg 2-3×/day for androgen deficiency; 75-150 mg/day in the infertility trials, where it failed to beat placebo). Off-label bodybuilding use is typically 25-100 mg/day. Any use should be clinician-directed; it is not a self-administered supplement.

Any time

Oral tablet (mesterolone / Proviron) — a prescription androgen

• Prostate cancer or untreated benign prostatic hyperplasia (androgens stimulate prostate tissue)
• Men attempting to conceive — it does not improve fertility and androgens can impair spermatogenesis
• Pre-existing male-pattern hair loss that the user wants to avoid worsening

• Testosterone / other anabolic-androgenic steroids
• Anticoagulants (e.g. warfarin)
• 5α-reductase inhibitors (finasteride/dutasteride)