A challenge with this vitamin is that some people can eat plenty of B12-rich foods but still can't absorb it properly
Many patients report changes within 4-8 weeks, with continued improvement over several months
So, we recommend using SL vitamin B12 rather than oral and IM, especially in patients who do not tolerate IM injection and patients who need prolonged vitamin B12 supplementation, such as patients with long-term metformin use and patients with pernicious anemia or with gastro-duodenal resection [51,52,53,54]
First, the dose used in the protocol (1,000 micrograms of methylcobalamin weekly) is far above what a multivitamin provides
Such effects could be related to pain-modulating properties observed with GH in other studies
Converting Between Units: mcg, mL, and mg Its important to understand the units for B12 injections