Soy Sauce contains phyto oestrogens (spelling?) so do tomatoes.
I never saw a serious study that demonstrated that the phyto variety had similar effects.
The woman I tried to help was so negative - especially during episodes (and phases thereof) of HRT I never got to see if soy and soya were any use.
HRT is another minefield, on some people it works wonders, on some you have to try three formulations, some people give-up on it - especially negative people.
I have seen the same conflicting reports on the male version of HRT
good luck