The key buyer question is whether the dose is sufficient to engage that mechanism meaningfully, which the published research context suggests is most clearly demonstrated at doses substantially higher than what's on the Vital Blood label
Similar to collagen, the body makes a lot of it when were young
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)
Endocr Relat Cancer 11, 643658, 11/4/643 10.1677/erc.1.00776 (2004)
Additionally, regular exercise and adequate sleep can also support glutathione levels