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Here's a general timeline of what patients typically experience: First 1-2 weeks - Increased energy and better mood

Week by week expectations Understanding typical progression helps set realistic expectations and identify whether your protocol needs adjustment

This injection is typically prescribed to potentially prevent or treat deficiencies of these B vitamins and to support patients with conditions like malabsorption, increased metabolic demand, or recovery from illness where oral vitamin intake is insufficient

If symptoms persist despite regular oral supplementation, absorption may be limited

Imai S, Guarente L