best time to take b12 injections How Quickly Does Shot Work? Duration of Benefits How Often Should You Get

Or remains lethargic

Optimal dosing protocols are based on extrapolation rather than controlled human research

These outcomes reflect observed biomarker and pathway changes under controlled conditions and are not established therapeutic claims

Vitamin B12 shots may be beneficial for those who are vitamin B12 deficient due to pernicious anemia, dietary deficiency (often from vegan or vegetarian diets), gastrointestinal surgery, and more

One study noted that B12 supplements, along with folic acid, improved symptoms of neuropathy in patients treated with certain chemotherapy agents

Researchers use to study its effects on lipolysis, fat metabolism, and energy expenditure in controlled laboratory settings