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Maintenance doses are then tailored to keep those levels topped up, and their duration of effect is directly tied to the prescribed frequency (e.g., a shot every 12 weeks for many)

Boosting Energy Levels Low B12 levels can cause fatigue and sluggishness, making it harder to stay active or stick to your exercise routine

Kuzminski, 1998

Because of its connection to so many aspects of normal human health, b12 deficiency can manifest itself with many symptoms

One of the primary reactions of methylcobalamin in the body is to convert homocysteine to methionine high homocysteine levels are undesirable and known to be an indicator of heart disease and stroke risk due to the fact free homocysteine in the blood causes sclerosis of the arteries, putting strain on the vascular system and the heart