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Search for: [Abstract = "Aztek, whereas v. Rawa contained only vitexin and isovitexin. The main flavonoid found in sprouts was rutin. Its contents were four times higher in quinoa sprouts than in amaranth. It was the only investigated flavonoid detected in amaranth sprouts, whereas quinoa sprouts also contained vitexin, isovitexin and morin. Sprouting conditions \(daylight vs. darkness\) did not have any influence on the gallic acid content, whereas light caused an increase in the level of rutin and darkness – an increase in the levels of vitexin and isovitexin. The above mentioned results suggest that seeds and sprouts of the investigated pseudocereals have relatively high antioxidative activity which can be attributed to the presence of polyphenols, the investigated phenolic acids, flavonoids and anthocyanins. In\-vivo tests on rats were carried out to determine whether oxidative stress induced by the administration of 31% fructose could be reduced by co\-administration of amaranth or quinoa seeds. The findings demonstrate that in fructose\-administered control groups, fructose\-induced damage to plasma and other tissues can be partly reduced by co\-administration of amaranth and quinoa seeds. Changes in malondialdehyde concentration in plasma of the control group evidence that fructose administration induced oxidative stress. Significant increase in its concentration clearly indicated intensification of lipid peroxidation processes. My studies on the effect of amaranth administration on the antioxidant status of rats’ plasma confirmed that lower doses of amaranth seeds did not protect plasma against fructose\-induced lipid peroxidation. Administration of higher doses of amaranth and quinoa seeds provided a protective mechanism, since the concentration of malondialdehyde in plasma decreased significantly, as compared to the control group. Amaranth\-enriched fodder, especially in a higher dose, caused a significant increase in catalase and glutathione peroxidase activities in heart tissue of the investigated animals, as compared to the control group. Supplementation with fructose\-enriched fodder did not lead to a decrease in glutathione peroxidase activity in this group. It can be concluded that the level of antioxidants present in heart tissue was raised through supplementation with amaranth seeds. These results confirm earlier findings on the advantageous effect of amaranth seeds on the cardiovascular system. Interesting results could be observed in rats supplemented with quinoa. In comparison with groups fed on different fodder, this group had significantly lower activity of enzymes in heart tissue. However, in response to fructose induced stress, a significant increase in glutathione peroxidase was observed, which is indicative of the protective response of cardiomyocytes against free radicals. Therefore, diet therapy can be successfully employed to restore the right concentration of antioxidants, both as a preventive measure, and on a short\-term basis to protect againstdamage caused by free\-radical processes. According to research, liver exhibits high resistance to moderate oxidative stress, and its enzymatic activity is not easily influenced by diet therapy \(glutathione peroxidase and catalase\). Increase in enzymatic activity in spleen tissue points to advantageous effect of pseudocereals on its antioxidative status. Results of my study demonstrate that fructose administration did not affect the concentration of total cholesterol in plasma. Additionally, the applied doses of seeds did not have a protective effect on the level of triglicerides which was significantly raised by fructose. However, the seeds changed the level of LDL, which decreased in all investigated groups of animals. It was also observed that the seeds of pseudocereals protected against a decrease in HDL concentration after fructose administration. In the face of the advantageous effects of amaranth and quinoa demonstrated in this study, and no significant side effects observed, pseudo"]

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