Polyherbal formulation (PHF) is the use of more than one herb in a herbal medicine preparation.
The concept is found in Ayurvedic and other traditional medicinal systems where multiple herbs in a particular ratio may be used in the treatment of illness.
[citation needed] The Ayurvedic text Sarangdhar Samhita, dated 1300 CE, has highlighted the concept of polyherbalism in Ayurveda.
Ayurvedic herbal formulations are prepared in a number of dosage forms, in which mostly all of them are PHF.
[further explanation needed] Due to synergism, polyherbalism confers some benefits which is not available in single herbal formulation.