Protective Effects of Some Graded Iranian Honey Samples Against Cold Water Immersion-Induced Gastric Ulcers in Rats.

Honey has a rich history of treating gastrointestinal diseases due to its diverse bioactive compounds. This study evaluated the protective effects of select Iranian honeys against cold water immersion stress (CWIS)-induced ulcers in rats. Forty male Wistar rats (250-280 g) were randomly assigned to eight groups (n = 5): control, CWIS, and groups treated with strong (eucalyptus, Annaab, and Jangale) and weak honeys (Chand Giah, Sumaq, Gaz) + CWIS. Honey selection was based on antioxidant capacity, phenolic content, and protein concentration. Rats received 20% honey in water (1 mL/kg) orally twice daily for 14 days; controls received water. After a 24-h fast, rats underwent 3-h CWIS to induce ulcers. Serum samples were analyzed for malondialdehyde (MDA), total antioxidant capacity (TAC), thiol groups, tumor necrosis factor alpha (TNF-α), and interleukin 6 (IL-6) levels. Stomachs were assessed for ulcer severity (gastric ulcer index), gastric juice volume, and histopathological changes. Honey types were categorized as strong (eucalyptus, Annaab, and Jangale) or weak (Chand Giah, Sumaq, and Gaz) based on total phenolic content, antioxidant effects (FRAP and DPPH), and protein levels. Ulcer group showed significant increases in MDA (64%) and TNF-α and IL-6 levels (98.5% and 111.6%), and decreases in ferric reducing antioxidant power and 2,2-diphenyl-1 picrylhydrazyl (FRAP, DPPH, and thiol levels [26%, 14.39%, and 26%]) compared to controls. Strong honey groups exhibited 50% lower gastric ulcer index compared to weak honey groups. This study showed that strong honeys, due to their higher phenolic, total protein, and antioxidant content, offer greater protection against gastric damage and oxidative stress compared to weaker honeys. These results highlight the importance of bioactive compounds in honey's therapeutic properties. Therefore, high-quality honeys with higher phenolic content can be considered as therapeutic supplements for gastrointestinal disorders, especially those caused by oxidative stress and inflammation.