This is exactly what you need for repeated withdrawal over days
Overview of Intestinal Mucosal Structure and Barrier Function The intestinal mucosal surface is an essential portal of entry of nutrients, ions, and fluids into the body that is comprised of multiple epithelial cell types serving diverse functions, connected by intercellular junctions, a luminal layer composed of glycocalyx, secreted mucus, water, and ions, and a subepithelial layer comprised of subepithelial nerves, vessels, immune cells, and lymphatics

Interpretation should consider: Symptoms CBC (especially if basophilia, leukocytosis, etc.) Liver function tests Renal function Inflammatory markers Even high serum cobalamin levels can be accompanied by functional deficiency Suggested Workup for Unexplained High B12 : Repeat B12 measurement off supplements Check: Liver enzymes CBC with differential Serum creatinine Holotranscobalamin active fraction of vitamin B12, bound to TCB II 8 Consideration of myeloproliferative neoplasm workup if hematologic abnormalities are present Imaging if malignancy suspected (e.g., abdominal imaging if liver pathology or malignancy is suspected) In summary, while elevated B12 is most often benign and related to supplementation or liver/renal dysfunction, it is essential to rule out underlying hematologic malignancy or solid organ cancer when unexplained or accompanied by abnormal clinical or laboratory findings

I have to tell you that if it were not for the oxygen treatments and the foot bath sessions I am not sure I would have survived chemotherapy
Inositol a carbocyclic sugar involved in cell signalling and lipid handling