injection of vitamin b complex with vitamin b12 B-Complex Compounding Vitamin B12 shots: Uses, benefits,

Oral B12 supplements are absorbed at roughly 1 to 5% in healthy adults, and even less in people with low intrinsic factor, atrophic gastritis, or gut absorption issues

These include how the patient is doing, any health problems, and the testing method

This absorption is almost entirely dependent upon intrinsic factor (IF), a glycoprotein secreted by parietal cells situated in the mucosa of the stomach

Although there is a relationship between low vitamin B12 levels and cognitive decline, clinical studiesincluding those involving people with Alzheimers diseasehave not shown improvement in cognitive function, even doses of the vitamin as high as 1000 micrograms, says Dr

PMID: 31193945