A dosha (Bioelements), according to Ayurveda, is one of three bodily Bioelements that make up one's constitution. These teachings are also known as the Tridosha theory. The three bioelements are always fluctuating in the body. They are highly unstable and changes with day and night, and with food. The central concept of Ayurvedic medicine is the theory that health exists when there is a balance between three fundamental bodily bio-elements or doshas called Vata, Pitta and Kapha.