根据日本京都大学医学部吉田修教授的研究表明,在南瓜、番茄和胡萝卜等绿色和黄色的疏菜内,含有大量维生素 A 的衍生物,能够抑制早期的膀胱癌。根据临床实验,在13个患有早期膀胱癌的病人中(恶性程度不高,每个患者分别有数个至10多个小肿块),每人每日服用10～16微克的维生素 A 衍生物,其中8个患者的肿块消失或缩小,效果甚显著。另有10个患者,在服用维生素 A 的同时,在膀胱内注 According to a study by Professor Yoshida Shizuoka of Kyoto University School of Medicine in Japan, a large amount of vitamin A derivatives can inhibit early stage bladder cancer in green and yellow vegetables such as pumpkin, tomato and carrot. According to clinical trials, in 13 patients with early stage bladder cancer (low grade, with several to more than 10 small lumps in each patient), each vitamin A derivative is administered at 10-16 micrograms per person per day, Eight of these patients disappeared or shrank, the effect is very significant. Another 10 patients, taking vitamin A at the same time, note in the bladder