The aim of the study was to determine whether high doses of Vitamin C may alleviate the effects of oxidative stress caused by ozone, or whether they actually intensify its course and demonstrate pro-oxidative activity. The experiment was conducted on adult male rats divided into 6 groups: Group I - control animals; Group II and III - animals which were simultaneously ozonated and administered intramuscular injections of Vit C in doses of 20 and 40 mg/rat respectively; Group IV and V - non-ozonated animals, which were administered the above doses of Vit C every fifth day for a period of 35 days; Group VI - rats ozonated without Vit C. The results of the study indicated that the highest level of indexes defining the intensity of oxidative stress occurred both in animals which were ozonated and given high doses of Vit C as well as in non-ozonated animals which were given high doses the vitamin. AST activity and glucose levels were also highest in the above groups and displayed a similar pattern. It may thus be assumed that high doses of Vit C do not prevent organisms from ozone-induced oxidative stress, and may even increase its intensity
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