In vitro inhibitory potentials of Thai formulated polyherbal tea against oxidative stress promoters

Ya-Tri-Kasornmas and Ya-Tri-Phigut are polyherbal tea that have been listed as essential medicines in the National List of Essential Medicines, Thailand. They are widely consumed among the Thai populace. Thus, aqueous extracts of Ya-Tri-Karsornmas and Ya-Tri-Phigut polyherbal formulations were subjected to screening against oxidative stress promoters such as reactive oxygen species using in vitro antioxidant models. In addition, their capacities to lower lipid peroxidation were measured. Yield of the extract from Ya-Tri-Phigut polyherbal formulation was 7.22% (w/w), while that from Ya-Tri-Kasornmas was 5.50% (w/w) (P < 0.05). The study revealed that the aqueous extract of Ya-Tri-Phigut showed better antioxidant capacities to inhibit reactive oxygen species and lipid peroxidation activities than Ya-Tri-Karsornmas (P <0 .05). Thus, Ya-Tri-Phigut polyherbal tea may potentially serve as a rich nutraceutical agent to combat oxidative stress and health related diseases.