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I will cover: What vitamin B12 actually does in the body Why do different bariatric procedures cause B12 deficiency in different ways How common the deficiency is, and why it is often missed The connection between B12, homocysteine, and clotting risk How I test for deficiency and what the results mean My two-tier supplement framework and where vitamin B12 fits The different supplementation options and when I use each When I delay surgery for B12 deficiency How vitamin B12 is managed through the perioperative period This article is part of my broader approach to vitamins and supplements before and after abdominoplasty (tummy tuck), which covers the full protocol across every nutrient I treat

Front Endocrinol 10:450 Matsuda F, Inoue N, Manabe N, Ohkura S (2012) Follicular growth and atresia in mammalian ovaries: regulation by survival and death of granulosa cells

Rifaximin, a poorly absorbed antibiotic: pharmacology and clinical potential

A.Jimnez-DazR

Glutathione is naturally present throughout the body, including within the gastrointestinal system, and plays a role in maintaining normal cellular and antioxidant processes