glutathione peroxidase assay protocol Assays To Monitor Oxidative Stress Red blood cell glutathione peroxidase

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Vitamin B 12 and homocysteine metabolism The figure shows the biochemical pathway of B-vitamin and homocysteine metabolism, highlighting the vitamin B 12 -dependent reaction catalyzed by methionine synthase

Stenson, W

doi: 10.1161/01.Atv.0000077477.40824.52

Introduction Vitamin B12 deficiency results in fatigue due to poorly formed red blood cells, and can cause neurological problems, including tingling in the fingers and toes, difficulty walking, and cognitive problems such as memory loss and confusion