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A Flexible Spending Account (FSA) is similar but is usually offered through an employer
Du, C.G
What the evidence does support is this: B12 deficiency causes fatigue and neurological symptoms, and correcting deficiency in people who are deficient improves those symptoms
Accessed November 27, 2017
Meanwhile, the transsulfuration pathway is based on demand for cysteine and its products (Coenzyme A, hydrogen sulphide, cystine, glutathione (GSH) and the selenoproteins) rather than a route for the disposal of methionine and homocysteine
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