Is soy protein isolate okay to consume while on birthcontrol pills?

Probably okay. Despite theoretical concerns regarding the combination of contraceptives and soy milk, there is no specific evidence suggesting that normal dietary quantities of soy milk can interact negatively with birth control pills. MayoClinic.com does not advise birth control users to avoid soy milk. Ref. http://www.livestrong.com/article/545211-soy-milk-and-birth-control/

Related Questions

Does protein shakes that contain soy decrease my birthcontrol pills effectiveness? I know soy has estrogen effects

It should not affect. As long as you eat a varied diet in addition to the shakes, there should not be any significant effect on BCP. Many BCP contain estrogen in additon to progesterone. Read more...