b12 injections im or sq Compounded Hydroxocobalamin (Vitamin B12) Injection Best Vitamin B12 Injection Sites:

The conversion between units and milligrams varies depending on the concentration of the product being used

The methylcobalamin form in particular shows nerve-repairing properties, and has been shown to reduce homocysteine levels, treat peripheral neuropathy, ALS, multiple sclerosis, Alzheimer, Bells palsy, and other neurological disorders

[129] [130] Later steps, especially the incorporation of the additional methyl groups of its structure, were investigated using 13 C methyl-labelled S-adenosyl methionine

But it sits squarely at the intersection of fat loss and longevity science, which is why it belongs in the catalog

Limited data indicate vitamin B12 deficiency may contribute to menstrual irregularities (but more study is needed)