B12[cyanocobalamin] is a vitamin required for hematologic and neurologic homeostasis. It's not advocated for treatment of hypothyroidism,nor does it cause enlarged lymph nodes.
Cause the amount of pain in my lower back/groin/testicle/thigh all on the left side. Drank that gallon of go-lytly and had no evacuation unitil 24 hours later and it was not a large amount of stool just brown water. A bottle of magnesium citrate gave the same results.
Taking B12 in larger quantities would have some side effects in producing lymphnodes in later part of the life. Also depression would be the net result of consuming in higher quantities.