The Cochrane concluded that orally administered vitamin B12 appeared to be as effective as the intramuscular route with respect to the short-term haematological and neurological responses observed in patients with deficiencies, but highlighted methodological limitations in both trials
Frost, J
Zinc chloride, B-complex, B12, NAC, vitamin C
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Erdogdu O, Nathanson D, Sjholm A, Nystrm T, Zhang Q: Exendin-4 stimulates proliferation of human coronary artery endothelial cells through eNOS-, PKA- and PI3K/Akt-dependent pathways and requires GLP-1 receptor