One is the online market of research-grade powders labeled not for human use. The other is a small number of medical clinics that actually evaluate you, prescribe a compounded protocol, and supervise it
if neurological involvement is present, maintenance is every two months Oral therapy is generally not appropriate where absorption is impaired (e.g., pernicious anaemia), as adequate levels cannot be reliably achieved Because B12 is water-soluble and any excess beyond hepatic storage capacity is excreted in the urine, it has a low toxicity profile
Monitor patients at higher risk for electrolyte disturbances
It is derived from a protein in the stomach and is purported to help healing of various tissues, including muscles, tendons, ligaments, cartilage, and even the gut
The honest summary: strong mechanistic and animal evidence, essentially no completed human efficacy trials