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This complex process means that conditions affecting the stomach or intestines can significantly impair B12 absorption, including pernicious anaemia, atrophic gastritis, previous gastric surgery, coeliac disease, Crohn's disease, and long-term use of certain medications (such as metformin, proton pump inhibitors, and H2 antagonists)
Typical usage rates range from 0.5 to 2 percent peptide concentration
However, it is important that for any medical condition or treatment professional guidance is followed
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