I recently purchased a sack of protein. The bag makes a big deal about being "Aspartame Free".

Is there a problem with Aspartame? I was under the impression it was safe.

Thanks in advance.

The artificial sweetener aspartame has been the subject of controversy since its initial approval by the U.S. Food and Drug Administration (FDA) in 1974. Concerns have been raised about the quality of the research supporting its safety and the long-term effects that increased consumption could have on the public.[26][27][28] Some scientific studies, combined with allegations of conflicts of interest in the sweetener's FDA approval process, have been the focus of vocal activism, conspiracy theories and hoaxes regarding postulated risks of aspartame.[29][30]
A 2007 safety evaluation found that the weight of existing scientific evidence indicates that aspartame is safe at current levels of consumption as a non-nutritive sweetener.[3] Some sources of claims regarding postulated aspartame dangers and conspiracies have been the subject of critical examination.[31] In 1987, the U.S. Government Accountability Office concluded that the food additive approval process had been followed for aspartame.[26][32] Based on government research reviews and recommendations from advisory bodies such as the European Commission’s Scientific Committee on Food and the Joint FAO/WHO Expert Committee on Food Additives, aspartame has been found to be safe for human consumption by more than ninety countries worldwide.[33][34] In 1999, FDA officials described the safety of aspartame as "clear cut" and stated that the product is "one of the most thoroughly tested and studied food additives the agency has ever approved."[35] A 2009 study concluded there is no controversy over the usage of aspartame.[36]

taken from wikipedia