Tohtori Irkin™ No. 1 The Essence 4.06mlExperience the restorative power of forest grown mycelium with our signature essence, concentrated with Irpene 94%, a rare active derived from the mycelium of Irpex lacteus. Formulated through 10 years of specialized mushroom fermentation research, this essence helps reinforce the skin barrier, boost elasticity, and visibly improve signs of agingrevealing smoother, healthier, more resilient skin over time.