Systematic review reveals intranasal insulin may improve olfactory dysfunction after viral infections, suggesting a need for further study.
Current evidence suggests that intranasal insulin, particularly via absorbable material-based delivery, may offer therapeutic benefit for persistent post-viral olfactory dysfunction, with possible additional gains from corticosteroid coadministration. These findings remain preliminary and require confirmation in larger, well-controlled studies.
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Kim et al. (2025) studied this question.
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