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Intrinsic factor is only made in the stomach and after a gastrectomy there is little to no more of it or gastric acid, and the active mechanism in the body where B12 is absorbed is either less available or not available at all depending on if the surgery was a total or a part of a gastrectomy

There is no known cause of MS, but many potential causes have been theorized

For brands planning to expand their skincare offerings beyond a single product, having a knowledgeable manufacturing partner can dramatically accelerate the development process

Journal of Chemical Information and Modeling, 56 (1), 127-138

Purity Greater than 98.0% as determined by: (a) Analysis by RP-HPLC