B12 deficiency which is more common, particularly in vegans, older adults, people with gastrointestinal disorders and those who have had gastrointestinal surgery, and people with pernicious anemia is associated with decreased glutathione
doi:10.1021/cr2001178 Xia F, Zuo X, Yang R, Xiao Y, Kang D, Valle-Blisle A, Gong X, Yuen JD, Hsu BBY, Heeger AJ, Plaxco KW (2010) Colorimetric detection of DNA, small molecules, proteins, and ions using unmodified gold nanoparticles and conjugated polyelectrolytes
Phocea, pseudoflavonifractor and lactobacillus intestinalis: three potential biomarkers of gut microbiota that affect progression and complications of obesity-induced type 2 diabetes mellitus
What benefits could caloric restriction bring to cancer patients
She's choline deficient (89% likelihood)