However, it is important to note that infants suffering from the rare genetic disease phenylketonuria (PKU) should not consume aspartame.
Yes, the sweetening agents used in Senokot Hi-Fibre are aspartame (a source of phenylalanine) and saccharin sodium.
Aspartame is 180 to 200 times sweeter than table sugar, so very little is used.
There is also some evidence that artificial sweeteners like aspartame and sucralose may still have an impact blood sugar.
Sugar-free foods, such as diet soda, which contain the artificial sweetener aspartame, are also prohibited foods for PKU patients because aspartame contains the amino acid phenylalanine.