Yesil Health is an AI-powered health assistant that utilizes GPT technology to provide personalized responses to health-related questions. It offers information and recommendations on various topics such as health symptoms, diet and nutrition, skin care, mental health, lab results, chronic conditions, exercise, and women's health. It is backed by a medical team and aims to provide trusted AI-powered assistance. However, it is important to note that the tool is experimental and its accuracy depends on the provided information.