A lot of people know how staying up all hours of the night can lead to weak immune systems, stress and other bad things. Why put your body through that experience, if you can help it? Well, as many college students know, sometimes you just can't help it. Burning through the midnight oil can seem like a necessity for good grades, but new findings suggest that those night owls could be doing more harm than good -- especially to their education!

A psychology professor at St. Lawrence University in New York conducted a study on 120 college students to try and find the effects of all-nighters on their GPA. She discovered that 60% of them were no strangers to the ever-popular sleepless study marathons. The results? Those students also had lower GPAs.

But this study has a few holes in it. For starters, college kids in that restless majority only had to admit to partaking in at least one all-nighter. Can anyone really consider one all-nighter a basis for lower GPAs? There was another exception which is even more insightful. Apparently a few in the minority of those admitting to more than one all-nighter had excellent GPAs. So what's the take-away here? Staying up all night probably shouldn't be your primary study tactic for final exams this semester. But if you must, make it work out for you (and be aware of the health costs involved). Just don't indulge in the 24-hour pancake, steak and milkshake buffet.