If you've "got milk" that came from the soybean rather than a dairy cow, you might want to consider the possible hormonal effects. Soybeans contain substances called isoflavones that possess hormonal activity -- especially on estrogen -- but the jury is still out regarding soy's effects on testosterone.

You can find soy milk lining the shelves of most grocery stores. With a wide range of child-friendly flavors, such as vanilla and chocolate, this creamy dairy milk substitute can be appealing to kids of all ages. Some infant formulas are even made from soy.

Milk is generally considered to be one of the most useful foods for the task of gaining muscles. It contains a high amount of protein because of its origin as an animal product. Some bodybuilders drink as much as 1 gallon every day.