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💇 Finasteride DHT Blockade Hair Growth Simulator

This simulation demonstrates the mechanism of action of finasteride in blocking dihydrotestosterone (DHT) to stimulate hair growth, particularly for treating androgenic alopecia.

Hair Loss Treatment Mechanism2DModerate60 FPS
finasteride-dht-blockade-simulator ↗ Open standalone

Androgenic Alopecia — DHT-Driven Follicle Miniaturization

Placeholder lead: DHT binds receptors, shrinking susceptible follicles over years.

  • Dermal papilla: Type II 5-AR location (placeholder short caption)
  • ~5x testosterone: DHT receptor affinity (placeholder short caption)
  • ~50%: Affected men by 50 (placeholder short caption)
  • Years: Miniaturization span (placeholder short caption)

How DHT shrinks follicles

Placeholder body text: DHT signaling shortens anagen phase, follicles shrink cycle by cycle.

Genetic susceptibility factors

Placeholder body text: androgen receptor gene variants set individual sensitivity levels.

Placeholder highlight: miniaturization is gradual and reversible early on.

Finasteride Inhibits 5α-Reductase Type II

Placeholder lead: finasteride binds the enzyme active site, blocking its function.

  • 5-AR Type II: Target enzyme (placeholder short caption)
  • 1 mg/day: Standard oral dose (placeholder short caption)
  • Competitive: Inhibition mechanism (placeholder short caption)
  • Weeks: Onset of action (placeholder short caption)

Enzyme active-site blockade

Placeholder body text: finasteride forms a stable complex occupying the catalytic pocket.

Dose adherence matters

Placeholder body text: consistent daily dosing sustains enzyme inhibition levels.

Placeholder highlight: missed doses let enzyme activity partially rebound.

Scalp DHT Levels Drop Roughly 70%

Placeholder lead: blocked conversion sharply lowers local scalp DHT concentration.

  • ~70%: Scalp DHT reduction (placeholder short caption)
  • ~70%: Serum DHT reduction (placeholder short caption)
  • Slightly up: Testosterone level (placeholder short caption)
  • ~1 month: Steady state reached (placeholder short caption)

Where the blocked testosterone goes

Placeholder body text: unconverted testosterone remains available, DHT pathway suppressed.

Follicular DHT exposure falls

Placeholder body text: lower local DHT reduces androgen receptor signaling at follicles.

Placeholder highlight: type I 5-AR still produces some residual DHT.

Miniaturization Halts, Regrowth Begins

Placeholder lead: surviving follicles re-enter longer anagen growth phases.

  • ~Month 2–4: Shedding phase (placeholder short caption)
  • ~Month 4–6: Visible thickening (placeholder short caption)
  • Increases: Anagen phase length (placeholder short caption)
  • Unchanged: Follicle count (placeholder short caption)

Recovery curve over months

Placeholder body text: thickening progresses gradually, plateauing near a year.

Temporary shed before regrowth

Placeholder body text: early synchronized shedding often precedes visible improvement.

Placeholder highlight: fully miniaturized follicles rarely fully recover.

Density Stabilizes — Reversible if Stopped

Placeholder lead: sustained therapy maintains gains; stopping resumes miniaturization.

  • 6–12 mo: Plateau reached (placeholder short caption)
  • Majority: Continued users improved (placeholder short caption)
  • Reverses: Effect after stopping (placeholder short caption)
  • ~12 months: Reversal timeframe (placeholder short caption)

Maintaining long-term gains

Placeholder body text: ongoing daily therapy is required to preserve density gains.

What happens if therapy stops

Placeholder body text: DHT rebounds and miniaturization resumes within months.

Placeholder highlight: benefit is maintenance, not a permanent cure.
⚙ Under the hood

This simulation demonstrates the mechanism of action of finasteride in blocking dihydrotestosterone (DHT) to stimulate hair growth, particularly for treating androgenic alopecia.

CanvasBiomedicine

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install

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