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Problems with intrinsic factor binding to ileal receptors in the diseased tissue leads to B12 deficiency

This pattern aligns with B12 pharmacokinetics: serum levels peak 8-12 hours post-injection, tissue saturation occurs over 48-72 hours (Andrs et al., Journal of Blood Medicine , 2018)

We consider the cause of the deficiency, how well they absorb it, and what they prefer

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B12 injections deliver a high dose of vitamin B12 directly into your bloodstream

The pharmacokinetics are clear: tesofensine reaches maximum plasma concentration (Tmax) 34 hours after oral administration regardless of time of day, but the compound's extraordinarily long half-life means this initial peak is less clinically relevant than the cumulative plasma buildup over the first two weeks