"According to Dr. Vivian V. Vetrano, vitamin B12 actually comes from coenzymes, which are already present in bacteria found on the human body (in and around the mouth, for example)."
Dr. Vetrano states that in the case of deficiency the body has a problem absorbing nutrients from food. Vitamin B12 deficiency, rather than being caused by diet, is often caused by Crohn's disease, celiac disease, and other digestive disorders.
Printed copy · Anthology Volume 1, page 410Printed copy from The Tender For Law Anthology, Volume 1, page 410 (printed 14 June 2014). Added by this site; not part of the Facebook export.