The oral daily dose far exceeds the vitamin requirement because the normal transporter protein-mediated absorption is absent, leaving only very inefficient intestinal passive absorption
A structural explanation for these findings was provided from our previous cryo-EM structures of CT(Pro32) and rAmy(Tyr37)-bound AMYRs structures where the bulky phenolic side chain of Y37 rAmy forms perpendicular stacking interactions with W79 ECD 15 , and additional interactions with the respective RAMP protomer that are likely important for selectivity of rAmy for AMYRs over CTR
But they engage different receptor systems , sit at different evidence tiers , and carry very different regulatory status
The AMP-mediated destruction of tumor cell membranes can help chemotherapeutics better enter tumor cells, so the combined use of chemotherapeutics and AMPs may help reduce the effective dose of chemotherapeutics, thereby reducing dose-related side effects, and achieving the effect of increased efficiency and reduced toxicity
Vitamin B12 helps make myelin, a fatty substance that protects our nerves
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