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The review documented DSIP's widespread distribution throughout the brain and peripheral tissues, its remarkably stable presence in cerebrospinal fluid, and its unusually long-lasting biological effects despite a short plasma half-life of only minutes

doi:10.1186/s41205-020-00069-2 90

Given that there is no placebo-controlled human data, no established dose, and a mechanism whose foundational papers were retracted, an absence of noticeable effect is fully consistent with the current evidence it does not necessarily indicate a defective product, the wrong route, or an insufficient duration

Many enthusiasts believe that this peptide contributes positively to physical resilience, structural integrity and tissue comfort during demanding training phases

& Takayama, H