dihexa blood-brain barrier penetration Evolution of blood–brain in brain diseases and related systemic nanoscale brain-targeting drug delivery strategies Frontiers | Overcoming the blood–brain
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doi: 10.1084/jem.190.7.915 12 AhmadRSorrellMFBatraSKDhawanPSinghAB

If 10mg is working well, there is no requirement to go higher

The review calls for properly powered, placebo-controlled human trials before clinical recommendations can be made

(Figure 1 illustrates NNMT utilizing SAM as a methyl donor to methylate NAM, yielding MNAM and SAH

Sublingual B12 is generally safe with minimal side effects
