You do not know the purity
When you take Vitamin B12 through an intramuscular injection, you can process 100% of that vitamin, whereas with an oral supplement, usually only about 50-70% of the vitamin is able to be processed and metabolized
And spinal cord injury models showing improved recovery
Exosomes have been shown in early research to protect the arthritic joint by promoting cartilage repair, inhibiting inflammation of the joint lining, and helping the bone around your joints stay strong (subchondral bone remodelling)
Available from: Bock-Marquette I, Saxena A, White MD, Dimaio JM, Srivastava D
Start with 250500mcg per day , evaluate results, and increase only if needed