Wanna bulk up? Drink skim milk

A recent study finds that drinking skim milk after working out is twice as effective as soy milk in building muscle mass.

Not only that, but those of you looking to gain muscle mass may be wasting your money on all those dietary supplements. In fact, Dr. Stuart M. Phillips, the study's author, told Reuters: "I have done these calculations and figure that ounce for ounce milk is 20-30 times less expensive than most supplemental protein sources available."

Most supplements provide you with "fast," or quickly digested proteins, which certainly promote muscle formation. However, the supplements don't contain "slow" proteins, which work to prevent muscle breakdown. Cow's milk has both.

It should be noted that these claims are speculations, based on tests conducted after one workout. While I'd like to see more investigation, in the meantime, I might test this out myself. A little muscle mass on my scrawny frame certainly wouldn't hurt, and there's no way you'd catch me buying all those pricey supplements.