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The length of time before you see the effects of vitamin B12 and symptoms subside, is going to depend on a few factors: B12 form Administration root Dosage Current vitamin B12 status Vitamin B12 is crucial for the production of blood cells, particularly red blood cells

One reason: Changes in stomach acid can be part of aging, and you need hydrochloric acid in your stomach to absorb B12

If youd like to take advantage of a lower price per vial, ensure a season-long supply, or hedge against future price increases, note the sweet discounts on the 3, 6, or 12-month kits

All these decisions will depend on your preference and what you need