Antioxidant activity of a salt-spice-herbal mixture against free radical induction.
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A combination of spices (Piper nigrum, Piper longum and Zingiber officinale), herbs (Cyperus rotundus and Plumbago zeylanica) and salts make up Amrita Bindu. The study was focused to evaluate the antioxidant property of individual ingredients in Amrita Bindu against the free radical 2,2'-azinobis-(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS). The analysis revealed the antioxidant potential of the ingredients in the following order: Piper nigrum>Piper longum>Cyperus rotundus>Plumbago zeylanca>Zingiber officinale. Two different experiments were designed. In experiment I, rats were fed with normal diet whereas in experiment II rats were given feed mixed with Amrita Bindu for 3 weeks (4 g/kg of feed). Rats from both experimental groups were challenged against a single intraperitonial injection of phenylhydrazine (PHZ) (7.5 mg/kg body weight). At the end of 24 and 72 h, blood was analysed for free radicals and antioxidant levels. It was interesting to note that rats with Amrita Bindu pretreatment showed significantly lower levels of free radicals, lipid peroxidation and protein carbonyls along with significantly higher levels of antioxidants when compared with rats without Amrita Bindu pretreatment on PHZ administration. These results reveal that Amrita Bindu, a salt-spice-herbal mixture exerts a promising antioxidant potential against free radical induced oxidative damage.