NAD Sprayed Up the Nose Helped Mice Regrow Their Sense of Smell
Graded Preliminary — study in mice with chemically induced smell loss and in lab-grown human olfactory stem cells, with no testing in people.
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- The authors declare no conflicts of interest.
This early animal work hints NAD might one day help restore lost smell, but human proof is missing.
A form of NAD delivered through the nose helped restore lost smell in mice and pushed stem cells to become new smell neurons. For anyone who lost their sense of smell after COVID, this hints at a possible future treatment. But this was tested in mice and lab-grown human cells, not in people yet. It's early days, so don't expect a nasal NAD spray at the pharmacy soon.
Conflict of Interest Disclosure: The authors declare no conflicts of interest.
Disclaimer: Research summaries are provided for informational purposes only and do not constitute medical advice. Always consult a qualified healthcare professional before making changes to your health routine.