José María Ricart, dermatologist: "What is coming are drugs guided by exoxomes that will send messages to the cells to tell them how they should rejuvenate" The skin is the largest organ of all we have and has the ability to show us the things that happen inside our body, such as cancers, nutritional deficiencies, hormonal alterations and a long etcetera. Dermatology has become one of the most specialties in-demand among the new batches of doctors.