92 and 12–35 mg/kg) in leafy green plants from Malaysia, Sri Lanka, China, Kathmandu, India and Turkey, respectively (Aweng et al. 2011; Kananke et al. 2014; Zhuang et al. 2009; Shakya and Khwaounjoo 2013; Yadav et al. 2013; Türkdoğan et al. 2002).