Purported AI-Generated Doctor Deepfakes Reportedly Used Guy's and St Thomas' Branding to Market Weight Loss Patches

January 9, 2026

The Guy's and St Thomas' NHS Foundation Trust has issued a warning about deepfake videos circulating on social media platforms like Facebook and TikTok. These videos, claiming to be endorsed by their clinicians, deceptively market weight loss patches with misleading medical claims.

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MEASURE 2.10 — similarity 0.584, rank 1. TAIM detail and related incidents →
MAP 1.6 — similarity 0.580, rank 2. TAIM detail and related incidents →
MAP 4.2 — similarity 0.576, rank 3. TAIM detail and related incidents →

Alleged deployer: unknown-scammers
Alleged developer: unknown-voice-cloning-technology-developers, unknown-deepfake-technology-developers
Alleged harmed parties: people-seeking-medical-advice, guy's-and-st-thomas'-nhs-foundation-trust-clinicians, guy's-and-st-thomas'-nhs-foundation-trust, general-public-of-the-united-kingdom, general-public, epistemic-integrity

Source

Data from the AI Incident Database (AIID). Cite this incident: https://incidentdatabase.ai/cite/1405

Data source

Incident data is from the AI Incident Database (AIID).

When citing the database as a whole, please use:

McGregor, S. (2021) Preventing Repeated Real World AI Failures by Cataloging Incidents: The AI Incident Database. In Proceedings of the Thirty-Third Annual Conference on Innovative Applications of Artificial Intelligence (IAAI-21). Virtual Conference.

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