vitamin b12 injections chronic fatigue syndrome Updated Booklet: & ME/CFS Vitamin B12 Deficiency: Symptoms, Causes

Unopened vials: Store at controlled room temperature (20-25 degrees C / 68-77 degrees F) Protected from light in original packaging Good until manufacturer-printed expiration date (typically 18-24 months from production) Do not freeze freezing can compromise the glass vial seal and alter preservative distribution After first puncture: Refrigerate at 2-8 degrees C (36-46 degrees F) 28-day use window from first needle puncture per Pfizer/Hospira prescribing information Swab the rubber stopper with 70% isopropyl alcohol before every puncture Label the vial with the first-puncture date Discard after 28 days regardless of remaining volume or visual appearance What shortens the 28-day window: Room-temperature storage after puncture (can reduce effective window to 7-10 days) Excessive puncture count (30+ punctures accelerate preservative depletion) Poor aseptic technique (skipping alcohol swabs introduces surface contamination) Temperature cycling (moving between fridge and room temp repeatedly) For a deep dive on shelf life, degradation signs, and the science behind the 28-day rule, see How Long Does Bac Water Last After Opening

Initially discovered in human gastric juice, it is thought to aid in the protection and healing of the stomach lining

Elite/Professional IF or NGB Membership/License: Membership or license issued by an International Federation or National Governing Body for Athletes who meet criteria as highly competitive professional Athletes

Mikus D, et al

After several treatments, patients who exercise and follow a healthy diet should be able to lose weight easier

Talk with a healthcare professional if you have chronic headaches or migraine