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glutathione oral administration of S-nitroso-l-glutathione (GSNO) provides anti-inflammatory and cytoprotective effects during ocular bacterial infections | Cellular and Molecular Life Sciences Best Glutathione Supplement | 4
Description
It was first isolated from human plasma but can be found in saliva and urine

So, when to take collagen also translates to "how long to take it": long enough for the tissues to complete a full renewal cycle

Cartilage penetrating cationic peptide carriers for applications in drug delivery to avascular negatively charged tissues

Furthermore, this serological approach fails to differentiate between an active infection and a past infection and cannot assess the patients response to antibiotic treatment 4,5
