side effects of injection vitamin b12 Are Shots Safe? Royal Palm Beach Medical Group What are the Side Effects

But large-scale human trials are needed to evaluate the efficacy and safety of certain peptides for specific functions before definitive claims can be made

Malinda et al

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PMID 14752199.

Symptoms of a vitamin B12 deficiency include: Anemia Fatigue and weakness Dizziness Memory loss or concentration Rapid heartbeat Excessive bruising Soreness of the mouth or tongue Although there is no solid medical research to support these claims, many people believe that Vitamin B12 is helpful in improving concentration and boosting energy, as well as preventing or improving the following conditions: macular degeneration, a weakened immune system, infertility, sleep disorders, allergies, asthma, skin disorders and heart or kidney problems

doi:10.1210/jc.2005-2227