I take 5000 mcg vit B12 twice weekly and my libido remains at zero so generalizations that it "works for libido" are far fetched. It may do something if you have a deficiency.
I absorb it too well in the methylcobalamin form, liquid or tablets - it takes me twice above the normal range, if I take it every day. I suspect that dose and form will raise the blood level of almost everybody, so injections are not necessary.
I absorb it too well in the methylcobalamin form, liquid or tablets - it takes me twice above the normal range, if I take it every day. I suspect that dose and form will raise the blood level of almost everybody, so injections are not necessary.