Your stomach and intestines, however, are built to withstand a variety of acidic digestive juices. For people with healthy digestive tracts, a little extra acid from Mountain Dew, which passes through your system relatively quickly, shouldn't harm your stomach like it does your teeth.
Defenders of Mountain Dew sometimes argue that orange juice contains as much or more citric acid as the neon green soda. "It's basically true," Ren said. "The pH of orange juice is between 3.5 and 3.8 — also very acidic. From what our experience is, yes, the rate of decay would be the same."
However, juice presents a small tradeoff: It erodes teeth, but it also provides vitamin C. "Orange juice has a healthy aspect, so people should continue to drink it," Ren said. He suggested minimizing the contact between the juice and your teeth by taking large gulps rather than small, frequent sips, then washing your mouth out with water. Or, you could use a straw.
Unlike orange juice, Mountain Dew contains no vitamin C… and, if you're lucky, no rubbery ghosts of mice, either.
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