Peer-reviewed research describes poor oral bioavailability
This can increase your need for B12 supplementation, and injections may be especially helpful in these cases
for neutral grounding on indications and biology, see Vitamin B12 Health Professional Fact Sheet , which outlines deficiency care and dosing context for clinicians
(The P in GLP-1, the wildly popular category of diabetes and weight-loss drugs that includes Ozempic, stands for peptide.) But many of the substances people are using to self-treat, with names like BPC-157 and TB-500, show promising effects in animal studies but have not been rigorously studied in humans, raising questions about whether they are safe and work as advertised
Pharmaceuticals, 2025
including 768 healthy controls, 133 patients with mild cognitive impairment, and 211 Alzheimer disease patients) found a U-shaped relation between RBC folate and plasma tHcy, such that higher tHcy was observed with the lowest and highest RBC folate concentrations compared with intermediate concentrations
