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Diminishing returns become apparent after 4 to 6 months for skin-related goals, at which point maintenance frequency (2 to 3 injections per week) replaces loading
But if youre still feeling run down, foggy, or just not quite like yourself, your body may be missing essential nutrients
In UK practice, monitoring is primarily based on clinical response rather than routine blood tests, as post-treatment serum B12 measurements can be misleadingly high and may not reflect tissue levels
Most users report visible improvements starting around 8 to 12 weeks of consistent injectable use, with optimal results building over 12 or more weeks of continuous administration
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