l glutathione deficiency symptoms – Understanding the Powerful Master Antioxidant Symptoms of Low Glutathione and
Description
the concentration is realistic for practical use directly)

JAMA 1997;278:13491356

Vegans/Vegetarians, people following restrictive diets, alcoholics, people suffering from persistent stress

Accelerated gastric emptying, which can occur after sleeve gastrectomy, may allow less time for B12 extraction and binding, though this is considered a secondary mechanism
Strm, S., Holm, F., Bergstrm, R., Strmberg, A

Proc Natl Acad Sci USA 112:1539615401
