Analysis shows varying analyte levels in tear fluid and blood, indicating potential for monitoring health.
This comprehensive analysis demonstrates that analyte concentrations in paired tear fluid and blood vary according to their functional categories, with cytokines and neuromodulators generally enriched in tear fluid, and antibodies and drugs more abundant in blood. Strong positive correlations between tear fluid and blood concentrations for most analytes support the potential of tear fluid analysis for monitoring systemic physiological and pathological conditions.
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Wang et al. (2025) studied this question.
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