Effect of Preservation Methods on Physicochemical Quality, Phenolic Content, and Antioxidant Activity of Stevia Leaves

Figure 4

DPPH free-radical scavenging activity of differently preserved stevia leaves as influenced by storage time. Values are the mean ± SD of three replicates and significant at  ≤ 0.05. C: commercial; FD: freeze-dried; GI: gamma-irradiated.