No you can't take Agnus castus and soy, Agnus helps raise progesterone levels and lowers excess estrogen, and soy causes a burst of estrogen so they would counteract each other and mess your cycle up hun, not worth the risk. I've read if you are overweight, get sore boobs towards your period or have longer cycles you have too much estrogen so you need take agnus castus. I'm talking agnus to raise my progesterone levels. xx