Benefits of B12 are improved energy and stamina, improved sleep quality and duration, improved mental clarity, higher metabolism, and balanced immune system. Aging means we absorb less vitamin B12 from food. It is estimated 85% of us come up short of the necessary B12 from our diet. Absorption of B12 in food requires a substance from our stomachs called intrinsic factor, the production of which decreases with age.
People with chronic fatigue or anemia require injections of vitamin B12 because the oral form is unreliable. Vitamin B12 shots are the most effective when taken at regular intervals.
We recommend once weekly for 4 weeks, followed by once a month. A regular injection scheduled can be individualized.