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Description
Levels of B12 along with methylmalonic acid (MMA) and homocysteine are usually measured to detect the B12 deficiency [2]

Available: [21] S

[DOI] [PubMed] [Google Scholar] 175.Shih DM, Xia YR, Wang XP, Miller E, Castellani LW, Subbanagounder G, Cheroutre H, Faull KF, Berliner JA, Witztum JL and Lusis AJ

These are important differentiations

A recent small scale study in healthy humans aged 1985 measured the ratios of cysteine:cystine and GSH:GSSG in plasma [99]
Cacciatore I, Cornacchia C, Pinnen F, Mollica A, Di Stefano A
