Naturopathic medicine emphasizes on prevention, treatment, and optimal health through the use of therapeutic methods and substances that re-establish the body's inborn capacity to heal itself without the adverse impacts of conventional drug. It is a specific primary health care system that blends modern scientific knowledge with traditional and natural forms of medicine. Naturopaths focus on a holistic approach, completely avoiding the use of surgery and drugs. Naturopaths often prescribe exposure to naturally occurring substances, such as sunshine, herbs and certain foods and encourage activities they describe as natural, such as exercise, meditation and relaxation. In addition to diet and lifestyle changes during treatment, they make use of natural therapies like botanical medicine, clinical nutrition, hydrotherapy, homeopathy, naturopathic manipulation and Traditional Chinese Medicine or acupuncture.