For those niche purists who find the tasty Martian flavor of Diet Pepsi somehow off-putting, there is Pepsi One—a different, more poisonous diet soda flavor.
A new analysis of sodas by Consumer Reports found that a single can of Pepsi One contains 43.5 micrograms of a chemical called 4-MeI, far more than any other soda. That chemical is on the state of California's list of carcinogens. Any product that potentially delivers more than 29 micrograms per day of 4-MeI must carry a warning label in California. But wait— The Pepsi Corporation has thought this all out! From the LA Times:
The soda giant said the levels of 4-MeI in its drinks did not amount to 29 micrograms per day because "the average amount of diet soda consumed by those who drink it is approximately 100 [milliliters] per day, or less than a third of a 12 [ounce] can."