For example, Castañeda, Ramos, and Ibáñez (2008), who evaluated the antioxidant activity of various plants, reported 97.2% of DPPH inhibition for the aqueous extract of cinnamon at 10% due to its high content of phenolic compounds.Satoh, Tohyama, and Nishimura (2005) determined a DPPH inhibition of 70% for the aqueous extract of green tea (30 mg/mL).