b12 injections making me feel tired injection makes sleepy Feeling more tired, sluggish or low in mood? You're not alone — shorter days and colder weather can leave your body needing that little bit of extra support. Vitamin B12 Feeling Tired All the Time?
Description
BMC Pregnancy and Childbirth

If your levels are already fine, a shot mostly tops up a tank thats already full

B12 overdoses are unusual

It is vital for brain function, nerve tissue health, and the production of red blood cells

NUTRITION 6-MIN READ UPDATED MAY 2026 Vitamin B12 After Bariatric Surgery: Why It Matters and How to Stay Above the Risk Line B12 deficiency is the most under-diagnosed long-term complication of bariatric surgery

"Associations of Maternal Vitamin B12 Concentration in Pregnancy With the Risks of Preterm Birth and Low Birth Weight: A Systematic Review and Meta-Analysis of Individual Participant Data"
