The benefits of vitamin B12 injections include treating or preventing symptoms, such as fatigue, heart problems, neurological damage, mood changes, muscle weakness and hormone imbalances
Seven coordinate complexes containing oxo ligands commonly are pentagonal bipyramidal with the oxo ligand(s) in the less sterically hindered axial position
2007 Jul;30(7):834-9., The effect of tripeptide-copper complex on human hair growth in vitro
You cannot target your belly specifically
If you need to boost the low levels of this vitamin in your body, you can take it as an oral supplement or as an injection both either in the form of cyanocobalamin or methylcobalamin
Glutathione lightens skin by inhibiting melanin production, converting darker melanin to a lighter form, and offering antioxidant protection