Suboptimal B12 causes brain fog, difficulty concentrating, mood changes, tingling extremities, and progressive neurological decline
PubMed , Environmental Health , vol
However, individuals with restricted diets or absorption issues may require additional supplementation, such as Vitamin B12 injections
A healthcare provider needs to evaluate you to confirm a diagnosis
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Health and Performance Goals: Some people also choose Vitamin B complex injections to support energy, focus, or athletic performance