what time of day should you take b12 injections How Often Can I Injections? Vitamin B12 and Folate :

This suggests that the current recommendation for vitamin B12 is likely not high enough

If you wear a Garmin watch and track your period using Garmin Connect, you have the option to make your menstruation phase (starting Day 1) visible in TrainingPeaks

That becomes the reference range

Product label: CYANOKIT (hydroxocobalamin) injection, powder, lyophilized, for solution [Meridian Medical Technologies, Inc.] Last revised: April 2011 [DailyMed] Renal Impairment (FDA) Cyanide poisoning: the safety and effectiveness of Cyanokit have not been studied in patients with renal impairment

Used for chronic weight management it is considered a widely safe and effective medical weight loss option

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