Mushrooms are believed to be a source of vitality. They are the basis of the Dr. Andrew Weil for Origins Plantidote Mega-Mushroom line. Weil is a medical doctor, botanist and integrative health expert, partnered with the botanical-based company to produce Plantidote. It incorpotates a combination of mushrooms (Hypsizygus ulmarius, Cordyceps, Chaga and Reishi). They are used with other natural ingredients and refreshing essential oils to promote skin firmness. Aveeno Active Naturals uses a "shiitake complex" to help accelerate skin cell renewal.