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Intranasal delivery of Huperzine A to the brain using lactoferrin-conjugated N-trimethylated chitosan surface-modified PLGA nanoparticles for treatment of Alzheimers disease

doi: 10.1073/pnas.79.6.2041

\The Department of Health advises you don't take too much as this could be harmful

doi: 10.1002/art.37828 167 ThorarinsdottirKCamponeschiAGjertssonIMrtenssonIL
There is some preliminary evidence that saunas and cold plunges can raise NAD+ as well, but these tools may not be for everyone, and research is still in very early stages