I read this just now:
Aspartame has not been studied long-term to determine its effects on humans. The Aspartame people would say differently and are much like the tobacco industry. They too, have difficulty admitting cigarette smoking is bad for health.
There are many theories out there. Some say that because the body craves calories the drinkers of diet soda can actually gain excess weight and become obese. Diet sodas stimulate "sweet" taste buds, so they?re more likely to find something "sweet" to eat.
Too much "regular" soda can cause sugar diabetes. If you drink even one soda a day your double your risk for type 2 diabetes compared to those who drink soda pop less than once a month.
Soft drinks are the best-selling product in American grocery stores, about $11.7 billion in sales annually.
Edit - One can of soda has about 10 teaspoons of sugar, 150 calories, 30 to 55 mg of caffeine, and is loaded with artificial food colors and sulphites. I can't think of any good reason to ever have it. The diet varieties are also problematic as they are filled with harmful artificial sweeteners like aspartame.
Studies have linked soda to osteoporosis, obesity, tooth decay and heart disease, yet the average American drinks an estimated 56 gallons of soft drinks each year. Plus, drinking all that sugar will likely suppress your appetite for healthy foods, which pave the way for nutrient deficiencies.
Soft drink consumption among children has almost doubled in the United States over the last decade, which is not surprising considering that most school hallways are lined with soda-filled vending machines.
Schools often make marketing deals with leading soft drink companies such as Coca-Cola from which they receive commissions--based on a percentage of sales at each school--and sometimes a lump-sum payment, in exchange for their students' health. School vending machines can increase the consumption of sweetened beverages by up to 50 or more cans of soda per student per year.
If you routinely drink soda--regular or diet--eliminating it from your diet is one of the simplest and most profound health improvements you can make.