If you're among the millions of men who've been misled into regular prostate cancer screenings, here's some advice: Skip the screening, and have another cup of coffee instead.

A Harvard Medical School study found that men who drank six or more cups of coffee each day had a 60 percent lower risk of aggressive tumors than men who didn't drink any coffee at all.

That's a lot of coffee... but the researchers also found that more modest coffee consumption had benefits, too: Between one and three cups each day was associated with a 20 percent lower risk, and those who drank four or five cups had a 25 percent lower risk.

That's just one more reason to enjoy your morning brew, since coffee has also been linked to a significantly lower risk of diabetes, Parkinson's disease, liver problems, skin cancer, gallstones and even cavities.

The researchers aren't sure what specifically in the coffee could be helping the prostate... but it's not the caffeine. They found the same reduced risk in men who drank decaf.

Another great natural way to help your prostate is exercise: Another new study from Harvard shows moderate exercise lowers the risk of death from prostate cancer by 22 percent.

P.S. One thing coffee won't do is sober you up. Another new study puts that old myth to rest, finding that alcohol can lessen the effects of caffeine... but the reverse isn't true. The research, published in the journal Behavioral Neuroscience, found that coffee didn't alter blood-alcohol levels nor did it improve decision-making among drunken mice. So next time you've had a few too many, skip the coffee and sleep it off instead.