I admit that I use to be a consumer of diet soft drinks - not a heavy consumer but one or two a day. This is one habit that I am ecstatic that I gave up. The evidence against sodas in general is mounting. Regular soda is being charge with causing obesity among other things. In fact, new studies out of California indicate that 62% of people who consume one soda per day is, indeed, overweight.
While diet soda may not directly cause immediate obesity at the same rate as its sugar-filled sister, diet drinks are not off the hook. The San Antonio Heart Study concluded that the more diet soda that a person consumed the greater their risk for future obesity. In fact, for each diet soda consumed per day the likelihood of becoming overweight within the following 7 years increased 65% (becoming obese in the same time period increased at a rate of 41%). Hardly a diet soda but certainly a DIE-t soda!
If the potential of becoming "larger than life" is not enough to get you off the juice, how about fatty liver disease? Studies have indicated that the methane component of aspartame is converted into formaldehyde. The body doesn't know what to do with formaldehyde so it is stored in the liver. Because the body doesn't know formaldehyde, the fat where it is stored cannot be processed for use as energy. In essence the body cannot get rid of the fat no matter how badly it is needed to supply energy to the body. This could be one reason many people cannot lose weight even with exercise and healthier diets. Additionally, in other studies diet soda has been linked to metabolic disorders and type-II diabetes. Studies participants who consumed diet soda at least daily had a 36% greater risk for metabolic syndrome and a huge 67% greater risk for the development of type-II diabetes.