tired after b12 injections Why do I feel worse a injection? How Fast Does B12 Injection

B12 plays a key role in synthesizing neurotransmitters such as serotonin and dopamine, which help regulate mood and reduce stress

This reflects the benzyl alcohol in the solution, but such use is incidental the main intended role of bacteriostatic water is diluting drugs

While supplements help, injections offer faster, more complete absorption

What are the benefits of intravenous (IV) vitamin B12 therapy

Not all of it can be utilised

The test needs to be done at least 48 hours after an injection with the most modern techniques - the time interval can be 10 days possibly more for some earlier test methods so advise would be leave for 2 weeks