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The people who found closer to 50% in their urine probably had a slight vitamin B12 deficiency, and some of the vitamin was stored for later use
The following factors may increase the likelihood of having a B12 deficiency
Clinicians estimate vitamin B12 requirements using values such as: Recommended dietary allowance (RDA): RDArefers Trusted Source National Institutes of Health Office of Dietary Supplements Go to sourceto a daily intake that, on average, is enough to meet the nutritional requirements of almost all people without underlying health conditions
Therefore, to maintain healthy levels of vitamin B12 in your body and youre older, youll likely need additional injections more often
Additionally, if your gastrointestinal tract does not function normally, as with celiac disease or Crohns disease, you may have trouble absorbing or releasing vitamin B12, which will affect the levels in your body and how long the vitamin stays there
Contact your doctor as soon as possible if you experience any new or changing symptoms after using vitamin B12 injections or supplements
