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Effects of monotherapy and combined AST and DHA on nitric oxide (NO) levels individually and combined in PA-treated Sprague Dawley rat brain homogenates and serum. (a) brain homogenates NO; (b) serum NO. Different letters (a–f) indicate significant differences (p ≤ 0.05). PA = penitrem A, AST = astaxanthin, DHA = docosahexaenoic acid.
