好吧，你換了一個新的Ad Hoc假設，立即從飲食／外因角度切換到基因／內因角度

再切換回來:

也有針對美國的亞裔移民女性性激素水平的調查。這樣在人種比較單一的群體裏測激素水平，可以排除不同人種基因的影響而專注於分析環境的影響。

但是你看西化並沒有使激素升高很多，不足以解釋西化時間越長的亞裔女性發病率越高這個現象。另外激素有好幾種，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.

所以我覺得激素升高是有些關係，但是難說是否為發病率升高的主要原因。