Ayurveda has both preventive and curative aspects. The preventive component emphasizes the need for a strict code of personal and social hygiene, the details of which depend upon individual, climatic, and environmental needs. Bodily exercises, the use of herbal preparations, and Yoga form a part of the remedial measures. The curative aspects of Ayurveda involve the use of herbal medicines, external preparations, physiotherapy, and diet. It is a principle of Ayurveda that the preventive and therapeutic measures be adapted to the personal requirements of each patient.