I have mentioned before about my reservations towards aspartame and recently there was that aspartame experiment on rats. There is a good list of aspartame side effects and some of the various articles here: Aspartame.
A fellow low carber Cleo shared her experiences recently as well: No More Aspartame For Me.
However one thing I ponder is if some of the reactions people report due to aspartame could also be tied to another additive, sodium benzoate. Sodium benzoate is very common in soft drinks, and other acidic items such as fruit juices, salad dressings, sauces and vinegar as well as cosmetics and mouth wash and has been linked to hyperactivity in children and DNA damage amongst other things as well as being thought to interact with other additives, E211 Revealed: Evidence highlights new fear over drinks additive
With that said, there is some good news that I wanted to share this article and a quote: Diet Coke to drop additive in DNA damage fear:
Coca-Cola is phasing out a controversial additive that has been linked to damage to DNA and hyperactivity in children.Lets hope they don't replace it with something equally as bad or worse!
Sodium benzoate, also known as E211, is used to stop fizzy drinks going mouldy.
Coca-Cola said it had begun withdrawing the additive from Diet Coke in January in response to consumer demand for more natural products.
By the end of the year no can or bottle will contain E211.