美国一项研究发现,菠菜等绿叶蔬菜有助保持大脑敏锐。每天只需吃一份或者两份菠菜,就能让智力“年轻”11岁。研究人员选取了平均年龄为81岁的950名老年人,进行长达10年的饮食习惯跟踪调查,每年进行一次智力测验。结果显示,相比不爱吃蔬菜的老年人,那些经常食用菠菜和羽衣甘蓝等绿叶蔬菜的老年人大脑衰老更慢,相当于认知能力下降的速度晚了11年。这可能是因为这些蔬菜中含有维生素K、 A study in the United States found that green leafy vegetables such as spinach help keep the brain sharp. Just eat one or two spinach a day, you can make intellectual “young ” 11 years old. The researchers selected 950 seniors with an average age of 81 years for a 10-year follow-up of their diet and an annual intelligence test. The results showed that older adults, who regularly consume green leafy vegetables such as spinach and kale, slowed their brain aging by as much as 11 years after their cognitive decline, compared with those who did not eat vegetables. This may be because these vegetables contain vitamin K,