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Injectable peptides administered subcutaneously reach systemic circulation and target tissues at therapeutic concentrations

Initially identified in research examining delta-wave sleep patterns, DSIP has been investigated for its interaction with neuroendocrine signaling pathways

*Correspondence: Irene Mattiola, [email protected] These authors have contributed equally to this work Disclaimer All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers

Until there is direct comparative data, route selection should be driven by clinical context and patient preference, not assumptions about delivery superiority