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This vitamin shortage can happen for a few reasons: when your body cannot take in vitamin B12 from food because of a condition called pernicious anemia, when you have certain illnesses or infections, or take certain medicines that stop your body from absorbing enough vitamin B12 from what you eat, or when you follow a vegan diet which means you do not eat any animal products, like meat, dairy, or eggs
The frequency of B12 shots depends on your individual needs and health goals
My cycle is mostly 28 days
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