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This reaction can occur because the peptide shares structural similarities with human growth hormone, making certain batches more sensitive to pH levels
But if they dont get your B12 level where it needs to be, injections may be the next step
Journal of Endocrinology and Metabolism , 4 (3), 64-77
The bioavailability difference that some supplement marketers emphasize appears minimal in practice for most people
Other conditions that make Vitamin B12 absorption more difficult are: Weight loss surgery or another operation that removed part of your stomach Heavy drinking Taking acid-reducing medication for a long time Certain health issues may also lead to the development of vitamin B12 deficiency such as atrophic gastritis, pernicious anemia, Crohns disease, celiac disease, immune system disorders, Graves disease and lupus
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