![]() UV-Vis spectrophotometer was used to measure the activity of catalase. ![]() Stress condition was achieved by five days fasting and swimming for 10 mins/day to test animals. The peel was maserated with chloroform, then fractionated by n-hexane. The aim of this research was to determine the effect of n-hexane fraction of H.polyrhizus’s peel and the dose that could increase activity of catalase. The peel of red dragon fruit (Hylocereus polyrhizus) as a potent exogenous antioxidants could support the internal enzyme activity to prevent free radicals. Catalase enzyme is one of the endogenous intracellular antioxidant that can be reduced by oxidative stress conditions. ![]() Production of excess free radicals cause oxidative damage and degenerative diseases.
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