A helpline swapped for a chatbot that gave weight-loss tips instead

The conversation

The National Eating Disorders Association (NEDA) had offered Tessa, a chatbot built with the vendor then known as X2AI, as what NEDA's own blog post announcing the tool called a free, screening-linked 'Body Positive program.' In late May 2023, consultant Sharon Maxwell tested Tessa and, according to reporting by NPR's Kate Wells, found it recommending she 'could lose 1 to 2 pounds per week' and keep a calorie deficit, guidance Maxwell said mirrors what fuels an eating disorder rather than treats one. NPR reports that less than 24 hours after Maxwell shared screenshots with NEDA, the organisation announced on 30 May 2023 that it had 'taken down' the chatbot 'until further notice.'

What the documents show

NPR's report, published 8 June 2023, quotes NEDA chief executive Liz Thompson stating that Cass, the company then operating Tessa, had changed the chatbot 'without NEDA's awareness or approval,' enabling generated answers 'beyond what Tessa's creators had intended.' NPR also quotes Cass founder Michiel Rauws saying the change was a 'systems upgrade' with an 'enhanced question and answer feature' using generative AI, and that the change 'was part of NEDA's contract.' The two accounts conflict on authorisation; NPR reports both organisations issued apologies without resolving that dispute. Ellen Fitzsimmons-Craft, the researcher who helped build the original chatbot, told NPR the version her team studied was rule-based, using only pre-written responses, because 'we were very cognizant of the fact that A.I. isn't ready for this population.'

The system boundary

NEDA's original announcement describes Tessa as a scripted program covering topics like body-image concerns and media literacy, positioned as a supplement to, not a replacement for, clinical care. NPR reports that NEDA's pivot toward Tessa followed a separate decision to close its long-running human staffed helpline, and quotes Thompson clarifying afterward that NEDA had not intended to suggest 'Tessa could provide the same type of human connection that the Helpline offered.' NPR further reports that NEDA had received an earlier complaint about problematic Tessa responses in October 2022, months before the May 2023 incident that led to the shutdown.

Where it fails

The dispute over who approved the generative feature is unresolved in these sources, and this entry does not take a side; what both parties confirm, per NPR, is that the deployed chatbot's actual behaviour diverged from what NEDA says it authorised. As retrieved 16 September 2026, NEDA's original blog post about Tessa returns an access-denied response rather than the original text.

• Who is contractually responsible when a third-party vendor changes a deployed assistant's behaviour without the operator's sign-off?
• What distinguishes a rule-based, pre-scripted chatbot from a generative one in a vendor's own contract language?
• What happens to the population a helpline served when it is replaced by an automated resource before that resource is fully tested?

NEDA's own announcement, NPR's reporting of both companies' statements, and the chatbot's current inaccessibility together trace a program from launch to public dispute to removal within about sixteen months.