Pb and Cd in medicinal plants (Case study: Shirazi thyme, sweet violet, pennyroyal and jujube)

Abstract

Introduction: Medicinal plants are a major source of drugs for the majority of people in the world. Unfortunately, little data is available on the safety of medicinal plants, especially in terms of heavy metal contamination. Therefore, this study was conducted to evaluate the potential risk of Pb and Cd in Shirazi thyme, sweet violet, pennyroyal and jujube marketed in Hamedan City in 2015.