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After that it slowly disappeared because it became more and more difficult to obtain radioactive B12 suitable for human use, and at the same time less and less acceptable to use radioactive B12 in a diagnostic test
Medical weight loss is a marathon, not a sprint
It may also reduce absorption of B12, so supplementing with that is recommended (B12 supplementation also helps with pancreatitis see below)
These include gastrointestinal disorders, such as Crohns disease or celiac disease, and surgeries like gastric bypass that alter the digestive tract
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