I think you've mixed up two mandatory food-labelling warnings here
Phenylalanine, usually present in aspartame, is contraindicated for those with Phenylketonuria.
The warning about its potential laxative effect will be because it contains more than 10% added polyols, probably sorbitol.
I hope this helps you when choosing sugar-free products in the future.
( tangledupinblue hairy badge with moving eyes, Fri 25 Jul 2014, 10:58, 3 replies)

What?
If dozer can bore on at length about pensions, why shouldn't I?
( tangledupinblue hairy badge with moving eyes, Fri 25 Jul 2014, 10:59, closed)

You're not a jumped up, dictionary bashing mid-life skater prick are you?

( Muns, Fri 25 Jul 2014, 11:30, closed)

All I know is, I shat liquid.
I assumed they were linked after reading the label.
( Muns, Fri 25 Jul 2014, 11:29, closed)

yup sorbital that's the badger
cool mints did for me. Thought I'd fart, realised it my mistake milliseconds before lift off and luckily managed a reflex clench and was very close to a toilet so I avoided buttered cheeks
(sittingduck Attention seeking, bullshitting fuck-knuckle, Fri 25 Jul 2014, 11:50, closed)