Google's latest announcement of the Personal Health Large Language model based on its Gemini models will be integrated into Fitbit Labs program and other AI features in the future. It aims to provide wellness advice and recommendations by analyzing Fitbit data. The model is trained using de-identified health signals validated with accredited coaches and wellness experts. However, it won't make medical diagnoses or treat conditions. The announcement raises questions about its potential, on-device processing and data security. The upcoming Google I/O conference may shed more light on its generative AI plans.