She found that different online dosha websites gave different results in personalized quizzes, and summarized that "Ayurveda is basically superstition mixed with a soupçon of practical health advice." Alternative medicines used in Ayurveda treatments have been found to contain harmful levels of lead, mercury and other heavy metals. See also Traditional Tibetan medicine#Three principles of function Dhātu (Ayurveda) References Ayurveda Tamil culture Traditional medicine in India Alternative medical systems