intrinsic factor test after b12 injection What laboratory and clinical tests should be used to determine whether my relative, who has been on long‑term vitamin injections for presumed pernicious anemia despite negative intrinsic‑factor and parietal‑cell antibodies and Vitamin B12 Deficiency in Pernicious

Due to kidney malfunction in CKD patients, CKD patients exhibit a significantly lower proportion of hypophosphatemia induced by FCM (0.27) than patients with normal kidney function and FCM (0.51)

Because the peptide occurs naturally in human plasma (at roughly 200 ng/mL in young adults, declining to approximately 80 ng/mL by age 60), topical supplementation essentially restores youthful local concentrations in treated skin

Hydroxocobalamin | Drugs | BNF NICE

Add to this the fact the procedure is often traumatic, I dont really like the results on most patients

intracellular half-life is prolonged because of lysosomal release and cytosolic resequestration, creating a depot effect that supports monthly maintenance dosing for chronic deficiencies

I hope you feel some improvement soon and sorry to hear your having such a rough time