Some animal studies have used intragastric (oral) administration and reported effects, which is notable because oral peptide delivery typically suffers from enzymatic degradation
They also check Vitamin B12 levels and how the patient is doing to adjust the treatment as needed
Not for human or veterinary use
If the issue lies with absorption, B12 shots or IV infusions are an effective alternative to oral supplements because they are administered via injection or intravenously, meaning they do not need to be absorbed through the digestive process
Inject slowly to reduce tissue trauma
*Methylcobalamin (Vitamin B12) is also indicated in those with pernicious anemia, diabetes, neuropathy, heart disease, circadian rhythm sleep disorders, memory loss, depression, fatigue, AIDS, inflammatory bowel disease (IBD), Lyme disease, osteoporosis, tendonitis, psychiatric disorders, Alzheimers disease, liver and kidney disease, and asthma