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When foods containing B 12 are eaten, the vitamin is usually bound to protein and is released by proteases released by the pancreas into the small bowel

Last updated on Mar 13, 2026

For details, including dosage, see the "What It Does" section of the Joint Supplements Review (Glucosamine, Chondroitin, MSM, and Boswellia), which includes CL's tests and comparisons of products

A serum B12 test under 200 pg/mL indicates a deficiency

For patients who want the IV layer on top of the at-home protocol, we offer a NAD+ plus glutathione infusion

This makes them a versatile tool in functional medicine for supporting overall gut function