Other metabolic side effects could be hypokalemia (low potassium levels in the body), extreme thirst, rapid weight gain, frequent urination and/or unexplained bleeding or bruising
Sources NIH Office of Dietary Supplements, Vitamin B12 Fact Sheet NIH Office of Dietary Supplements, Choline Fact Sheet MedlinePlus, Cyanocobalamin Injection Mayo Clinic, Vitamin B12 Injections and Weight Loss NCBI Bookshelf, Essential Amino Acids PubMed, Inositol Phosphate Signaling Network The American Journal of Clinical Nutrition, Lipotropic Agents and Lipid Transport
Oral Supplements: High-dose B12 tablets may be prescribed if absorption is possible
By boosting energy levels and reducing fatigue, they may help improve overall activity and exercise performance
Elderly Individuals As people age, the ability to absorb vitamin B12 from food decreases
your level isn't that high either