Background: Potassium bromate (KBrO 3) has been used widely for water disinfection, hair coloring, oxidizing agent in food, food additive in bread making process as maturing agent, and as dough conditioner for flour. Purpose: This study was carried out to investigate the effects of two doses (150 and 300 mg/kg) of ethanolic extract of strawberry leaves on antioxidant capacity of liver, kidney and testis, thyroid hormones, and kidney function in rats treated with potassium bromate as toxic and free radical producer compound. Study design: Forty-eight male rats were divided: group 1 served as control, group 2 treated with oral dose of strawberry leaves extract (150 mg/kg), group 3 treated with oral dose of strawberry leaves extract (300 mg/kg), group 4 treated with oral dose of potassium bromate (20 mg/kg), group 5 treated with strawberry leaves extract (150 mg/kg) and potassium bromate (20 mg/kg), and group 6 treated with strawberry leaves extract (300 mg/kg) and potassium bromate (20 mg/kg) for 4 weeks. Methods: Determination of thiobarbituric acid reactive substance (TBARS), glutathione (GSH), and superoxide dismutase (SOD) in liver, kidney, and testis tissues. Measurements of serum total protein, albumin, urea, creatinine, free triiodothyronine (FT3), free thyroxine (FT4), and insulin. Results: Administration of potassium bromate (KBrO 3) induced significant increase in TBARS; decrease in GSH and SOD in liver, kidney, and testis tissues; non-significant decrease in total protein and albumin; significant increase in serum urea, creatinine, and FT3; and significant decrease in FT4 and insulin. Administration of strawberry leaves extract showed significant improvement in some studied parameters. Conclusion: In conclusion, the protective effect of strawberry leaves extract may be attributed to its antioxidant property.

Mulberry leaves extract prior to exposure to gamma irradiation has radio protector against hazardous effect of irradiation in male rats.

Olive tree leaves have been widely used in traditional remedies in European and Mediterranean countries and in the human diet as extracts, herbal teas, and powder, which contain several potential bioactive compounds that may have antihypertensive, antiatherogenic, anti-inflammatory, hypoglycemic, hypocholesterolemic, antidiabetic and antioxidant activities. The present study was carried out to evaluate the role of olive leaves extracts (OLE) in ameliorating the metabolic changes in rats treated with carbon tetrachloride (CCl4). Forty-eight male rats were classified into six groups; the first group was the control which received 1 ml distilled water, the second group was treated daily with oral dose of cold OLE (1 ml/kg) for one month, the third group was treated daily with oral dose of boiled OLE (1 ml/kg) for one month, the fourth group was treated daily with oral dose of CCl4 (1 ml/kg) for one month, the fifth group was treated with both cold OLE and CCl4 (1 ml/kg for each) for one month and the sixth group was treated with both boiled OLE and CCl4 (1 ml/kg for each) for one month. Serum levels of thiobarbituric acid reactive substance (TBARS), alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP), gamma-glutamyl transferase (GGT), lactate dehydrogenase (LDH), urea, creatinine, insulin and glutathione (GSH), catalase (CAT), albumin, total protein, free triiodothyronine (FT3) , free thyroxin (FT4) were measured in serum.  Histological examination of hepatic tissue was examined. The results showed that administration of CCl4 to rats induced significant increase (P<0.05) in serum levels of thiobarbituric acid reactive substance (TBARS), alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP), gamma- glutamyl transferase (GGT), lactate dehydrogenase (LDH), urea, creatinine, insulin and significant decrease (P<0.05) in glutathione (GSH), catalase (CAT), albumin, total protein, free triiodothyronine (FT3) and free thyroxin (FT4). The histological examination of hepatic tissue showed some degenerative changes while significant improvement in biochemical and histological changes was observed either in CCl4 + cold OLE or CCl4 + boiled OLE groups. It could be concluded that the protective effect of olive leaves extract either cold or boiling may be attributed to its antioxidant properties. The obtained results indicated that both cold and boiled olive leaves extract has potent effect to restore the antioxidant status, hepato-renal function, insulin and thyroid hormones near to the control levels.