Is there a connection between caffeine intake and dry eyes?

    Researchedby:
    Bill Willis
    Last Updated: October 13, 2024

    Since caffeine is a diuretic (causes the body to lose water by expelling more fluid through the urine), it has been investigated as a potential cause of dry eyes. A couple of large, population-based cohort studies found no association between caffeine intake and dry eyes.[1][2] Moreover, an RCT in healthy individuals without dry eyes found that caffeine ingestion caused a significant intake in tear production, suggesting [3] that it may actually have the opposite effect.