In this 31-minute conference talk from Data Science Conference Europe 2024, explore how Nikola Milosevic presents VerifAI, an open-source biomedical question-answering system designed to verify answers and detect hallucinations in AI-generated responses. Learn about the critical need for factual verification in life sciences where inaccurate information cannot be tolerated. Discover the system's implementation of advanced Retrieval-Augmented Generation (RAG) that combines both lexical and semantic search techniques with LoRA fine-tuning to ensure response accuracy. Understand how quantization techniques improve system performance by reducing latency and hardware requirements. Access the complete open-source project including code, models, and datasets that contribute to advancing open science in the biomedical field. This presentation was delivered on November 22nd at DSC EUROPE 24 in Belgrade.