Soy milk is THE DEVIL!!! It causes production of estrogen and lowers the production of testerone. Don't ever drink it! Save yourself!
The list of foods which contain phytoestrogens include soy beans, tofu, tempeh, soy beverages, linseed (flax), sesame seeds, wheat, berries, oats, barley, dried beans, lentils, rice, alfalfa, mung beans, apples, carrots, wheat germ, ricebran and soy linseed bread
There are studies that go either way on this.
Me personally, I use Silk Light soy milk, great for protein shakes and make hot breakfast cereals