Is Mountain Dew Good or Bad for Sleep?

Mountain Dew MDX along with jolt Cola and Vault contain 71 milligrams of caffeine per 12-ounce serving. That’s the upper limit of what the U.S. Food and Drug Administration allows.

Other sodas aren’t much better. Also, typical soda drinks like Pepsi and Coke contain citrus as well as sodium benzoate and other chemicals which can aggravate the gastrointestinal tract and promote acid reflux, not a recipe for a good night’s sleep.