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Another non-selenium glutathione peroxidase, GPx7, which lacks GPx activity, has recently been described as a novel phospholipid hydroperoxide GPx [11, 19,20,21]

A., Valds, P., Singh, A., Rinsch, C., & Auwerx, J

Certain individuals are at a higher risk for B12 deficiencyincluding those following strict vegan or vegetarian diets, as well as patients with conditions that impair nutrient absorption, such as pernicious anemia, celiac disease, Crohns disease, or a history of gastrointestinal surgery

Bethesda, MD, 1996

Harper AJ: Production of transgenic and mutant mouse models

Effects of oral administration of N-acetyl-l-cysteine: A multi-biomarker study in smokers