In physics, the Big Bang theory proposes that the universe is always expanding. The Big Crunch theory says that after the expansion, gravity will haul the universe back into a singularity — which will then Big Bang all over again.

That expansion and contraction is sort of how your guts work. But to prevent them from going completely Bang and Crunch, here's our theory: have a cup of Joe.

For 30 to 40 percent of the population, calmer movement of food through the intestines can be set in motion by a cup of filtered black coffee. That's right. Besides keeping your blood vessels flexible and lowering your stroke risk by 30 percent, Joe's can keep you regular.

First, coffee's acidity can stimulate your stomach to produce more gastric acid, which helps break down proteins and aids digestion. Then it increases the amounts of the hormones gastrin and cholecystokinin that your body produces.

These two help with the whole digestive passage, including acting as stimulants of smooth muscle contraction (peristalsis).

And for the 88 percent who are fast caffeine metabolizers (you can down 12 ounces in an hour without getting a headache or anxiety), two to three cups of brewed caffeinated coffee a day increase brain focus and muscle endurance and reduce inflammation.

It will also deliver heart-loving phenols (they're in decaf, too) that can decrease your risk of nine cancers by more than 10 percent and help you dodge, Parkinson's disease, Alzheimer's disease, and Type 2 diabetes.