Vitamin B12 injections and supplements can provide benefits for those who are deficient in the vitamin. You can easily become deficient if you do not eat much animal protein, suffer from an infection or take medications to reduce the acid in the stomach.
VitaminB12 can provide many benefits.
Injections
Vitamin B12 injections begin to work immediately, as it goes directly into the bloodstream. Those deficient in the vitamin will notice an overall sense of more energy.
Supplements
Vitamin B12 in a supplemental form is a good idea to take, though taking it in pill form tends to not be absorbed by the body. Taking B12 Sublingual is a better way to ingest it since it melts in the mouth and goes into the bloodstream faster.
Significance
Currently there is no evidence to support that B12 shots are more effective than the Sublingual method. The main problem with B12 is that it is hard for the body to absorb; in pill form it can be destroyed by the digestive system.
Considerations
Many people like B12 shots because of the instant energy they feel afterward that lasts several days. B12 shots can be rather costly, at about $25 per injection as of October 2009.
Final Thoughts
Elderly people and those with weakened immune systems normally benefit from B12 shots rather than the supplements.
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