For recovery enhancement, performance optimisation, or longevity goals in healthy people, until a randomised, placebo-controlled trial in a defined population with an objective primary endpoint and pharmacovigilance over a clinically meaningful duration produces data we do not currently have, we just don't have good evidence of benefit, let alone safety
Low energy & fatigue Feeling constantly tired, lacking energy, or struggling to stay awake could indicate a B12 shortage
Dizziness or lightheadedness may occur in some patients after the injection, possibly related to an autonomic nervous system response or mild hypotension following the dose
Matern D, Tortorelli S, Oglesbee D, Gavrilov D, Rinaldo P