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Sildenafil, Tadalafil, Vardenafil, Avanafil

The first-line treatment for erectile dysfunction worldwide.

Oral PDE5 InhibitorFDA Approved (Sildenafil 1998)

Master Reference, Biochemistry, the HPG Axis, Measurement, Decline, and the TRAVERSE Era

The hormone the entire marketplace is built on, and the single entry that anchors everything else in this library.

Endogenous Androgen / Steroid HormoneFDA Approved (testosterone products approved only for hypogonadism caused by an underlying medical condition; 2015 labeling action; February 2025 cardiovascular black-box removal)

Master Overview, Lifestyle, Evidence, and What Actually Moves the Needle

The largest curated library on natural testosterone, and an honest map of how strong the evidence really is.

Category Master OverviewNot Applicable (lifestyle & dietary domain)

Where Replacement Ends and Anabolic Steroid Use Begins

Same molecule, different medicine, the boundary is drawn by dose and intent, not by the drug.

Dose-Defined Risk CategoryTestosterone is a Schedule III controlled substance; performance-enhancement prescribing is off-label/inappropriate

5-Alpha-Reductase Inhibitors and Persistent Sexual and Mood Effects

A hair-loss and prostate drug at the center of a persistence debate.

5-Alpha-Reductase Inhibitor RiskFDA-approved; label updated (2012) on persistent sexual effects

Li-ESWT (low-intensity extracorporeal shockwave therapy)

Promising mechanism, real RCTs, and marketing well ahead of the evidence.

Energy-Based TherapyNot FDA-cleared for ED specifically

Penile Extenders, Mechanical Traction Therapy

The one enlargement modality with real (if modest) evidence, and even that is mainly for Peyronie's.

Mechanical Traction DeviceNot FDA approved for enlargement; some devices marketed for Peyronie's

Overview of the Online Testosterone Marketplace

How COVID deregulation turned testosterone into a subscription.

Telehealth Market OverviewTestosterone is a Schedule III controlled substance; prescribing regulated by DEA and state boards

Selective Androgen Receptor Modulators (Ostarine, Ligandrol, RAD-140, etc.)

Marketed as safer steroids - sold illegally, none FDA approved.

Investigational Androgen Receptor ModulatorNot FDA approved; investigational, illegal in supplements

Fadogia agrestis (Nigerian aphrodisiac shrub)

Heavy influencer hype, zero human trials, and animal data showing testicular toxicity.

Unproven Botanical (Safety Concern)Not FDA evaluated; no human safety or efficacy data