Conclusion Carnosine has a very good protection effects on DNA oxidant damage in Ascorbate-Fe(superscript 2+) system and its antioxidant ability has a close connection with its imidazole cycle.

• 结论肌肽在维生素C-亚铁离子系统中对DNA氧化损伤有明显的保护作用，其抗氧化机制可能与其所含的咪唑环有关。