My dad used to drink a ton of diet mountain dew - to the extent his kidneys were starting to not function!  Do you know about the dangers of this drink?
Mountain Dew
Mountain Dew (stylized as Mtn Dew) is a carbonated soft drink brand produced and owned by PepsiCo. The original formula was invented in 1940 by Tennessee beverage bottlers Barney and Ally Hartman. A revised formula was created by Bill Bridgforth in 1958. The rights to this formula were obtained by the Tip Corporation of Marion, Virginia. William H. "Bill" Jones of the Tip Corporation further refined the formula, launching that version of Mountain Dew in 1961. In August 1964, the Mountain Dew brand and production
, which claims that its introduction in 1928 makes it the first soft drink marketed in this category, earlier than Mountain Dew. The brand's slogan is "Pop the Drop" which is analogous to Mountain Dew's former "Do the Dew" slogan. Citrus Drop contains 26.2 mg of caffeine, while Diet Citrus Drop contains 25.1 mg. The Xtreme version tastes the same, but contains more caffeine than the original Citrus Drop, and comes in a 'tribal' themed can. According to Kroger's customer service, Diet