how do you feel after b12 injections Common & Rare Side Effects of Vitamin Why do I feel worse

You can expect the benefits of vitamin injections to last for about a week

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Supports the energy-producing structures inside cells during the high-stress repair window (mitochondrial-membrane stabilization)

Vitamin B12 boosts the formation of red blood cells, supports nerve function and contributes to DNA synthesis

Neurological and Psychiatric Effects Some users report experiencing: Brain fog Anxiety or panic attacks Insomnia Restlessness Palpitations Feelings of dissociation or derealization These effects are usually associated with high-dose supplementation (500 mcg to 5000 mcg daily) or B12 injections