There are a number of very good health reasons to cut back or totally eliminate soda from your diet. The following articles and earlier posts discuss some of the ways both diet and regular soda are linked to health problems. Note in the second article that there's currently no federal limit for a byproduct of some types of caramel color called 4-MEI (a carcinogen) in food or beverages. California's Proposition 65 Law (aimed at reducing consumers' exposure to toxic chemicals) requires a health-warning label on sodas with too high levels of 4-MEI resulted in manufacturers producing soda with lower levels of that chemical in the state. But sodas out of California may have higher levels! From Science Daily:
Increasing diet soda intake is directly linked to greater abdominal obesity in adults 65 years of age and older. Findings raise concerns about the safety of chronic diet soda consumption, which may increase belly fat and contribute to greater risk of metabolic syndrome and cardiovascular diseases. Metabolic syndrome--a combination of risk factors that may lead to high blood pressure, diabetes, heart disease, and stroke--is one of the results of the obesity epidemic.
The San Antonio Longitudinal Study of Aging (SALSA) enrolled 749 Mexican- and European-Americans who were aged 65 and older at the start of the study (1992-96). Diet soda intake, waist circumference, height, and weight were measured at study onset, and at three follow-ups in 2000-01, 2001-03, and 2003-04, for a total of 9.4 follow-up years. At the first follow-up there were 474 (79.1%) surviving participants; there were 413 (73.4%) at the second follow-up and 375 (71.0%) at the third follow-up.
Findings indicate that the increase in waist circumference among diet soda drinkers, per follow-up interval, was almost triple that among non-users: 2.11 cm versus 0.77 cm, respectively. After adjustment for multiple potential confounders, interval waist circumference increases were 0.77 cm for non-users, 1.76 cm for occasional users, and 3.04 cm for daily users. This translates to waist circumference increases of 0.80 inches for non-users, 1.83 inches for occasional users, and 3.16 inches for daily users over the total 9.4-year SALSA follow-up period.
From Medical Xpress:
Public health researchers have analyzed soda consumption data in order to characterize people's exposure to a potentially carcinogenic byproduct of some types of caramel color. Caramel color is a common ingredient in colas and other dark soft drinks. The results show that between 44 and 58 percent of people over the age of six typically have at least one can of soda per day, possibly more, potentially exposing them to 4-methylimidazole (4-MEI), a possible human carcinogen formed during the manufacture of some kinds of caramel color.
"Soft drink consumers are being exposed to an avoidable and unnecessary cancer risk from an ingredient that is being added to these beverages simply for aesthetic purposes," says Keeve Nachman, PhD, senior author of the study and director of the Food Production and Public Health Program at the CLF and an assistant professor at the Johns Hopkins Bloomberg School of Public Health. ."
In 2013 and early 2014, Consumer Reports partnered with the CLF to analyze 4-MEI concentrations of 110 soft drink samples purchased from retail stores in California and the New York metropolitan area...While the 2014 study of the 110 samples of soda brands was not large enough to recommend one brand over another or draw conclusions about specific brands, results indicated that levels of 4-MEI could vary substantially across samples, even for the same type of beverage.
Researchers also found sharply contrasting levels of 4-MEI in some soft drinks purchased in the New York metropolitan area, versus California. "Our study also found that some of the soft drink products sold in California that we sampled had lower levels of 4-MEI than the samples we looked at of the same beverages sold outside the state, particularly in our earlier rounds of testing. It appears that regulations such as California's Proposition 65 may be effective at reducing exposure to 4-MEI from soft drinks, and that beverages can be manufactured in ways that produce less 4-MEI," suggests Nachman. ."