“…One study found 33% of products tested contained unlisted ingredients (Newmaster et al., 2013 ), whilst a 2019 study reported that 27% of the herbal products in the global marketplace were adulterated (Ichim, 2019 ). Many commercially available herbal remedies also have toxic effects when used in larger doses, or in certain circumstances (Chen et al., 2013 ; Cohen & Ernst, 2010 ; De Groot, 2013 ; Ernst, 2000 ; Fu et al., 2008 ; Lee et al., 2020 ; Lynch et al., 2006 ; McEwen, 2015 ; Mei et al., 2017 ; Nazari et al., 2017 ; Odaguchi et al., 2019 ; The Alpha‐Tocopherol Beta Carotene Cancer Prevention Study Group, 1994 ; Venkatramani et al., 2013 ; Werneke et al., 2004 ). Herbal products are usually controlled under different regulations to drugs (e.g., as dietary supplements or natural health products) and have not been subjected to the same scientific scrutiny.…”