Transport of vitamin B1 in the human body (IMAGE) European Molecular Biology Laboratory Caption The human body doesn’t produce vitamin B1, so we must obtain it from our food. On its way from the gut to the cells throughout the body, vitamin B1 must cross several cell membranes. One of the most critical hurdles for B1 is the blood-brain barrier. EMBL Hamburg’s Löw Group has provided detailed molecular insights into how vitamin B1 overcomes these obstacles. Credit Isabel Romero Calvo/EMBL Usage Restrictions Credit must be given to the creator. Adaptations must be shared under the same terms. License CC BY-SA Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.