Collaborative Online International Learning (COIL) is a teaching and learning approach where students and academics from different countries collaborate through the use of the internet. This gives students the opportunity to meet peers and academics from other backgrounds and enhance transferrable skills by working together on a project. Here, we describe a COIL programme that took place from 2021 to 2023 between the University of Surrey and CEU San Pablo Madrid. Students from Surrey and Madrid teamed up under the supervision of an academic from either institution to research the biochemical basis of a human disease. They then presented their findings at an online international conference to an audience of their peers. An online icebreaker session allowed students to get to know their work groups, and they connected via videoconferencing and filesharing software. Most students felt this was a valuable experience and that it improved their understanding of biochemistry.