好吧，你换了一个新的Ad Hoc假设，立即从饮食／外因角度切换到基因／内因角度

再切换回来:

也有针对美国的亚裔移民女性性激素水平的调查。这样在人种比较单一的群体里测激素水平，可以排除不同人种基因的影响而专注于分析环境的影响。

但是你看西化并没有使激素升高很多，不足以解释西化时间越长的亚裔女性发病率越高这个现象。另外激素有好几种，有的是上升了，有的是降低了（雄激素）。

Our main finding was that androgens, particularly DHEA, were lower in Western-born Asian women; this was true in both pre- and postmenopausal women. Moreover, in postmenopausal women, the androgens tended to be highest among the least westernised women and declined as the degree of westernisation increased. For the oestrogens, levels between Asian- and Western-born women were not significantly different in pre- or postmenopausal women, and no clear patterns according to degree of westernisation were observed.

所以我觉得激素升高是有些关系，但是难说是否为发病率升高的主要原因。