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Kovalzon and Strekalova, summarizing the field in 2006, were explicit: the link between DSIP and sleep had never been further characterized, in part because of the lack of isolation of the DSIP gene, protein and possible related receptor, and the hypothesis of DSIP as a sleep factor was extremely poorly documented and still weak (Kovalzon & Strekalova, 2006)

How To Take Glutathione Glutathione is available in several forms, each with different absorption rates: Daily Dosage and Forms Oral supplements provide a convenient way to increase glutathione levels, though absorption may be lower than other forms

International Journal of Neuropsychopharmacology 2010

The literature is not large