pmc.ncbi.nlm.nih.gov/articles/PMC...
No Evidence of Dehydration with Moderate Daily Coffee Intake: A Counterbalanced Cross-Over Study in a Free-Living PopulationIt is often suggested that coffee causes dehydration and its consumption should be avoided or significantly reduced to maintain fluid balance. The aim of this study was to directly compare the effects...pmc.ncbi.nlm.nih.gov