Zenagen Revolve System: Replenish and Restore Hair Loss ShampooIndustry leading nutraceutical formula targets hair loss at the roots, defending follicles against dihydrotestosterone or “DHT”—the molecular culprit that causes 95% of hair loss in men and women. Hair grows back thicker, fuller and healthier with just five minutes of shampoo-based treatment, 3-4 times per week.