“…Of the nine trials, five were rated as high quality Suppapitiporn et al, 2006;Blevins et al, 2007;Hussain, 2007;Ludvik et al, 2008). However, most of them did not describe randomization method (Ludvik et al, 2004;Huseini et al, 2006;Mang et al, 2006;Suppapitiporn et al, 2006;Blevins et al, 2007;Lu et al, 2008;Ludvik et al, 2008) and did not mention whether placebo and single herb was indistinguishable (Ludvik et al, 2004;Huseini et al, 2006;Mang et al, 2006;Blevins et al, 2007;Lu et al, 2008;Ludvik et al, 2008). The latter is considerably important especially for aromatic herbs such as cinnamon and fenugreek.…”