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The cyclic structure and the D-residue introduce their own verification questions: mass spectrometry confirms composition but cannot distinguish a D-phenylalanine from an L, since the two are isobaric, and cyclization changes mass by only the loss of water relative to the linear precursor
A Glutathione normally exists in the reduced form (GSH) in the body but is converted to the oxidized form (GSSG) by stimuli such as oxidative stress
Key points to remember Nausea and vomiting are common but usually mild and temporary
Tracking methods include: DEXA scans: The gold standard for measuring fat mass versus lean mass
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