Id say the effect lasted about 24 hours
Embarking on a journey through B12 Shots & B12 Injections: The Good, Bad, and Alternative
Brenda works closely with you to adjust your treatment schedule, ensuring that you receive the most benefit from the injections without over-supplementing
It's also important to let us know if you have any allergies (especially to cobalt or B12), or if you have Leber's disease, kidney problems, or are pregnant or nursing
an unusual or allergic reaction to methylcobalamin, cobalt, other medicines, foods, dyes, or preservatives