I took a lot of interest in this when it was first announced in it's research abstract form. I'm not sure who's on the bandwagon now trying to get this to market. Being a former worker in the medical research field for some years, I went straight for the raw data and found this; The fact that raw soy milk inhibits hair growth was only offhand mentioned as a "side outcome" of the researchers findings. Their statement was basically that raw soymilk has a protein in it, if a hair is plucked or removed somehow, and this area is then doused with raw soymilk, the protein has a chance to get down into the follical and deactivate the hair growth cells. It cannot be pasteurized soy milk, pasteurization (super heating)destroys all the necessary natural proteins that are needed to make this work, it has to be fresh and raw. I wanted to test this myself, because they were so cloudy about their findings. So here where I lived I went to just about every whole foods health food store I could find. I spent a whole day off from work doing this. And, I could not find any unpasteurized raw soymilk. It's all pasteurized or ultra-pasteurized. When I spoke to the one knowledgeable person on the subject I found, he said that there's no such thing as raw soymilk. There's no commercial use for it, and it's not sellable, too many germs, bacteria, and it's an ugly green color that people wouldn't go for. Being that I just want it for topical use, I asked where to get it anyway. He told me I'd have to go to a soy mill where they produce the milk. There's only one small farm here where I live that produces soy milk so I have to get around to contacting them.
You know the funniest images come from this. I imagine a girl standing in a bathtub with a scuba mask and snorkle, someone off camera yells, "Ready for easy permanent hair removal?!" The girl, her voice hard to make out because of the snorkle, says, "Ready." And they toss a bucket of soymilk on her. The man off camera then asks, "How's it working? Can you feel your hair going away?" Then there's a pause, and the girl says with the snorkle in her mouth, "...I don't know."
That's just me though