Vitamin B12 Shots Boost Energy Only for the 4% of U.S. Adults Who Are Deficient
Updated
Updated · The Guardian · Nov 8
Vitamin B12 Shots Boost Energy Only for the 4% of U.S. Adults Who Are Deficient
3 articles · Updated · The Guardian · Nov 8
Summary
Most people with normal B12 levels are unlikely to get more energy from injections; treatment helps mainly when fatigue or mental slowing stems from a true deficiency.
About 4% of U.S. adults have low B12, with higher risk in people over 60, vegans, heavy alcohol users, patients on metformin or acid reducers, and those with Crohn’s, celiac or stomach surgery.
A simple blood test can check B12, but interpretation is not always straightforward: many labs flag under 200-250 pg/mL, while some clinicians treat symptomatic patients below 400 pg/mL.
Shots are best for severe deficiency, nerve symptoms or absorption problems such as pernicious anemia; for many others, high-dose pills work about as well and cost less.
Med spas still market the injections as quick pick-me-ups because they are generally safe and profitable, with doses costing spas under $1 and selling for $25 to $75.