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An untreated vitamin B12 deficiency can lead to neurological problems or pernicious anemia, which occurs when your body doesnt have enough B12 to produce the amount of red blood cells it needs ( Vitamin B12 shots are typically the most common way to prevent or treat a deficiency

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Our guide to the best time to take your tirzepatide shot and the best time to take a GLP-1 shot cover the timing considerations in full