Is this Causing Your Chronic Cough?

Vitamin B-12 deficiency causes central and peripheral nervous system damage.  It has been implicated in sensory neuropathy and autonomic nervous system dysfunction -- which can in turn have a role in chronic, unexplained coughs.

A recent study showed that vitamin B-12 deficiency patients had a higher prevalence of laryngeal hyperresponsiveness.  After being given B-12 supplements, their symptoms and laryngeal, bronchial, and cough thresholds significantly improved.

According to the study in the American Journal of Clinical Nutrition:

This study suggests that [vitamin B-12 deficiency] may contribute to chronic cough by favoring sensory neuropathy as indicated by laryngeal hyperresponsiveness and increased NGF expression in pharyngeal biopsies of [vitamin B-12 deficiency] patients. [vitamin B-12 deficiency] should be considered among factors that sustain chronic cough, particularly when cough triggers cannot be identified.”

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