Only testing can tell you the answer, but a daily B12 injection schedule should be your starting point
Long-term antibiotics may reduce biotin-producing gut bacteria
Seeing that sort of experience, even for a doctor, stays with you, says Heber
Supporting Brain Function and Mood Vitamin B12 supports memory, focus, and mood balance
Monitoring Treatment Response in Pernicious Anemia Its very important to keep an eye on patients with pernicious anemia to make sure vitamin B12 therapy is working
High B12 and cancer: what the research honestly shows Several observational studies have found that among people with an unexplained high B12, meaning elevated with no supplement or injection to account for it, a cancer is subsequently diagnosed more often than in people with a normal B12