Erectile dysfunction affects more than 50 percent of men aged 40 to70 and 70 percent aboe age 70, according to the Massachusetts Male Aging Study.

• 根据马萨诸塞州男性老龄化研究结果，40到70岁男性中超过50%25的人，和70岁以上的男性中70%25的人受勃起功能障碍的困扰，