[Nightshade]

Phytoestrogens are weaker so they might compete for receptors with estrogen from your hrt

True!  Don't combine strategies....  Could be deadly even!

I'm not. There's foods I eat and supplements I take for my chronic illness that have phytoestrogens in them. I was wondering how much of this is theoretical in terms of blocking. I can't make any sense out of studies on this subject.