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Objective: Gamma irradiation is an effective technique can be used to reduce contaminants in herbal products. Peperomia pellucida (L.) Kunth belongs to Piperaceae family has some biological activity, such as antioxidant and ACE inhibitor. The aimed of this research was to determine the effects of gamma irradiation on microbiological, phytochemical content, antioxidant and ACE inhibition activity. Methods: Sample was irradiated at a various dose of 0, 2.5, 5, 7.5 and 10 kGy. Microbiological was determined as total aerobic plate count (TAPC), and total yeast and mold (TYC), total phenolic content (TPC), total flavonoid content (TFC), antioxidant and ACE inhibition activity were investigated by various in vitro colorimetric methods. Results: Irradiation dose of 10 kGy reduced TAPC and TYC. Irradiation dose of 10 kGy slightly increased TPC, antioxidant, and ACE inhibition activity (p Conclusion: gamma irradiation was found to be sufficient to ensure microbiological safety, increase TPC, the antioxidant and ACE inhibitory activity but caused degradation of flavonoids on Peperomia pellucida (L.) Kunth. Key words: ACE inhibitor, Antioxidant, Gamma irradiation, Microbiological, Peperomia pellucida (L.) Kunth, Total phenolic, Total flavonoid.

journal of young pharmacists

Effects of Gamma Irradiation on Microbiological, Phytochemical Content, Antioxidant Activity and Inhibition of Angiotensin Converting Enzyme (ACE) Activity of Peperomia pellucida (L.) Kunth