每天喂家兔马齿苋干粉8g，11周后观察血清脂质过氧化产物（丙二醛）和超氧化物歧化酶（SOD）活力变化。结果，家兔血清丙二醛（MDA）含量明显低于食用马齿苋前的水平，而血清SOD活力明显高于食用马齿苋前的水平。结果提示，通过提高SOD活力以减少和消除自由基和过氧化脂质对机体的损伤作用可能是野生马齿苋抗衰老功效的机理之一。

Activities of serum superoxide dismutase(SOD)and lipid peroxide of rabbits were observed before and 11weeks after feeding 8g/d of dried Portulaca oleraceaL. powder. A decrease in serum malondialdehyde and an increase in SOD were observed after feeding. These results suggested that P. oleracea may be used as an effec-tive anti-aging food.