Some common side effects include: Nausea Vomiting Stuffy nose Diarrhea Restlessness Insomnia Body odor (fishy smell) Some serious side effects may include: Tachycardia (fast heart rate) Hypertension (high blood pressure) Fever Storage Store at controlled room temperature
Higher doses might be necessary to treat deficiencies
Walline, OD, PhD, an optometrist and the associate dean for research at The Ohio State University College of Optometry
Supplements Vitamin B12 can be easily supplemented with oral, sublingual (under the tongue), nasal sprays and gels, and topical forms
Moreover, it is required for the transport and metabolism of fats and cholesterol within the body, which is important for the healthy support of the endocrine, cardiovascular, and hepatic systems
B12 Injections: Are They Safe and What Should You Expect