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However, this decision is highly individual and depends entirely on the specific cause and severity of your B12 deficiency, as well as your bodys unique absorption capabilities
If you have trouble breathing, seek help immediately
Many patients report less tiredness within two to four weeks of starting injections, depending on how depleted their levels were at baseline
Vegetarians/Vegans: Plant-based diets may lack sufficient B12
Others feel energy rise in the first week
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