b12 injections syringe size What Needle for Injection? B12 Injection Kit: Syringes &
Description
Relative sensitivities of serum cobalamin, methylmalonic acid, and total homocysteine concentrations

What does practice say about injecting vitamin B12

However, strongest does not always mean best for every patient

Steady use stops daily crashes and mood swings
1000 mcg B12 & 400 mcg L-Methylfolate (B9) | Max Absorption: Each serving contains a ideal daily dose of 1000 mcg of 3 forms of B12 plus 400mcg of L-Methylfolate per serving

Clinical trials used fixed doses regardless of body weight
