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From what I've read & what I've read on here etc, as everyone is different, it does vary
B12 is involved in the production of neurotransmitters such as serotonin and dopamine, which regulate mood and emotions
Vitamin B12 injections are often marketed as a way to boost metabolism and aid in fat burning, but the evidence supporting these claims is limited
Each injection should contain at least 5,000 mcg of pharmaceutical-grade methylcobalamin to be effective, and most patients notice improvements in energy, sleep, and mood within weeks of starting proper B12 therapy
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